Radiation Dosimeters
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Transcript of Radiation Dosimeters
RADIATION DOSIMETERS
INTRODUCTIONGeneral requirements for dosimetersDosimeter is a device that measures
directly or indirectlybull Exposurebull Kermabull Absorbed dosebull Equivalent dosebull Or other related quantitiesThe dosimeter along with its reader is
referred to as adosimetry system
INTRODUCTIONA useful dosimeter exhibits the following
propertiesbull High accuracy and precisionbull Linearity of signal with dose over a wide
rangebull Small dose and dose rate dependencebull Flat Energy responsebull Small directional dependencebull High spatial resolutionbull Large dynamic range
PROPERTIES OF DOSIMETERS Accuracy specifies the proximity of the
mean value of a measurement to the true value
Precision specifies the degree of reproducibility of a measurement
NoteHigh precisionis equivalent to small standard deviation
PROPERTIES OF DOSIMETERS
Examples for use of precision and accuracy
High precision High precision Low precision Low precision and and and and High accuracy Low accuracy High accuracy Low accuracy
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
INTRODUCTIONGeneral requirements for dosimetersDosimeter is a device that measures
directly or indirectlybull Exposurebull Kermabull Absorbed dosebull Equivalent dosebull Or other related quantitiesThe dosimeter along with its reader is
referred to as adosimetry system
INTRODUCTIONA useful dosimeter exhibits the following
propertiesbull High accuracy and precisionbull Linearity of signal with dose over a wide
rangebull Small dose and dose rate dependencebull Flat Energy responsebull Small directional dependencebull High spatial resolutionbull Large dynamic range
PROPERTIES OF DOSIMETERS Accuracy specifies the proximity of the
mean value of a measurement to the true value
Precision specifies the degree of reproducibility of a measurement
NoteHigh precisionis equivalent to small standard deviation
PROPERTIES OF DOSIMETERS
Examples for use of precision and accuracy
High precision High precision Low precision Low precision and and and and High accuracy Low accuracy High accuracy Low accuracy
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
INTRODUCTIONA useful dosimeter exhibits the following
propertiesbull High accuracy and precisionbull Linearity of signal with dose over a wide
rangebull Small dose and dose rate dependencebull Flat Energy responsebull Small directional dependencebull High spatial resolutionbull Large dynamic range
PROPERTIES OF DOSIMETERS Accuracy specifies the proximity of the
mean value of a measurement to the true value
Precision specifies the degree of reproducibility of a measurement
NoteHigh precisionis equivalent to small standard deviation
PROPERTIES OF DOSIMETERS
Examples for use of precision and accuracy
High precision High precision Low precision Low precision and and and and High accuracy Low accuracy High accuracy Low accuracy
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS Accuracy specifies the proximity of the
mean value of a measurement to the true value
Precision specifies the degree of reproducibility of a measurement
NoteHigh precisionis equivalent to small standard deviation
PROPERTIES OF DOSIMETERS
Examples for use of precision and accuracy
High precision High precision Low precision Low precision and and and and High accuracy Low accuracy High accuracy Low accuracy
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS
Examples for use of precision and accuracy
High precision High precision Low precision Low precision and and and and High accuracy Low accuracy High accuracy Low accuracy
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERSNote The accuracy and precision
associated with a measurement is often expressed in terms of its uncertainty
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERSNew Concept by the International
Organization for Standardization (ISO) Guide to the expression of uncertainty in measurementldquo
This new guide serves as a clear procedure for characterizing the quality of a measurement
It is easily understood and generally accepted
It defines uncertainty as a quantifiable attribute
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS Standard uncertainty is the uncertainty of a
result expressed as standard deviation Type A standard uncertainty is evaluated by
statistical analysis of a series of observations
Type B standard uncertainty is evaluated by means other than statistical analysis This classification is for convenience of discussion only
It is not meant to indicate that there is a difference in the nature of
the uncertainty such as random or systematic
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS Combined uncertainties The determination of the final result is normally
based on several componentsLinearity The dosimeter reading should be linearly
proportional to the dosimetric quantity Beyond a certain range usually a non-
linearity sets in This effect depends on the type of dosimeter
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS
Two possible cases
Case Abull linearitybull supralinearitybull saturation
Case Bbull linearitybull saturation
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERSDose rate dependence MD may be called the response of a dosimeter
system When an integrated response is measured the
dosimetric quantity should be independent of the dose rate dDdt of the quantity
Other formulationThe response MD should be constant for different
dose rates (dDdt)1 and (dDdt) 2 M = 1048577 (M D)(dD dt)dt M = (M D)1048577 (dD dt)dt
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PROPERTIES OF DOSIMETERS Energy The response of a dosimetric
system isgenerally a function of the radiation energy The term radiation quality is often used to
express a specific distribution of the energy of radiation
Therefore a dependence on energy can also be called a dependence on radiation quality
Since calibration is done at a specified beam quality a reading should generally be corrected if the users beam quality is not identical to the calibration beam quality
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
PERSONAL DOSIMETERSA small radiation monitoring device worn by
persons entering environments that may contain radiation
Desirable characteristics Should be lightweight durable and reliableShould be inexpensive
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
WHO SHOULD WEAR A PERSONAL DOSIMETER Healthcare or laboratory workers in non-
emergency environments that may contain radiation Examples radiology nuclear medicine and
radiation oncology department staff Workers in emergency environments that
may contain radiation Examples first responders and first receivers
Workers in industrial environments where radiation is used Examples nuclear power plant workers or
employees at radiation sterilizing facilities
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
WHERE ARE PERSONAL DOSIMETERS USUALLY WORN Flat badges are usually worn on the torso at
the collar or chest level but can be worn on the belt or forearm
Ring shaped badges can be worn on the finger when dose to the finger may exceed dose to the badge worn elsewhere on the body
First responders and first receivers Wear water-resistant personal dosimeters on the
outer layer of personal protective equipment (PPE)
Should be able to easily see and hear a dosimeter alarm while wearing PPE
May wear a personal dosimeter underneath waterproof outerwear
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
TYPES OF PERSONNEL DOSIMETERS
Film badgePocket ionization chambersThermo luminescent dosimeters (TLD)Optically stimulated luminescence (OSL)Solid State
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
FILM BADGE Most widely used and most economical Consists of three parts
Plastic film holder Metal filters Film packet
Can read x gamma and beta radiation Accurate from 10mrem - 500rem Developed and read by densitometer A certain density value equals a certain level of
radiation Read with a control badge Results generally sent as a printout
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
ADVANTAGES AND DISADVANTAGES OF THE FILM BADGE Lightweight durable
portable Cost efficient Permanent legal record Can differentiate between
scatter and primary beam Can discriminate between
x gamma and beta radiation
Can indicate direction from where radiation came from
Control badge can indicate if exposed in transit
Only records exposure where itrsquos worn
Not effective if not worn Can be affected by heat
and humidity Sensitivity is decreased
above and below 50 keV
Exposure cannot be determined on day of exposure
Accuracy limited to + or - 20
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
POCKET DOSIMETER The most sensitive personnel dosimeter Two types
Self-readingNon self-reading
Can only be read once Detects gamma or x-radiation
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
ADVANTAGES AND DISADVANTAGES OF THE POCKET DOSIMETER
Small compact easy to use
Reasonably accurate and sensitive
Provides immediate reading
Expensive Readings can be
lost Must be read
each day No permanent
record Susceptible to
false readout if dropped or jarred
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
THERMO LUMINESCENT DOSIMETERS(TLD) Looks like a film badge Contains a lithium fluoride crystal Responds to radiation similarly to
skin Measured by a TLD analyzer Crystal will luminescence if exposed
to radiation then heated More accurate than a film badge
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
ADVANTAGES AND DISADVANTAGES OF THE THERMOLUMINESCENT DOSIMETER
Crystals contained in TLD interact with ionizing radiation as tissue does
Determines dose more accurately
The initial cost is greater than that of a film badge
Can only be read once
Records exposure only where worn
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
OPTICALLY STIMULATED LUMINESCENCE (OSL)bull ldquoCapturesrdquo information in an Aluminum
Oxide matrixbull Releases information by laser stimulationbull Can be reread after processingbull Durablebull Landauer Only
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
SOLID STATE
Provides instantaneous information regarding dose accumulation
Simple to use Not a ldquolegalrdquo record Dose range device dependent
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
HOW TO WEAR THE RADIATION DOSIMETER
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-
THANKS
- Radiation Dosimeters
- INTRODUCTION
- INTRODUCTION (2)
- PROPERTIES OF DOSIMETERS
- PROPERTIES OF DOSIMETERS (2)
- PROPERTIES OF DOSIMETERS (3)
- PROPERTIES OF DOSIMETERS (4)
- PROPERTIES OF DOSIMETERS (5)
- PROPERTIES OF DOSIMETERS (6)
- PROPERTIES OF DOSIMETERS (7)
- PROPERTIES OF DOSIMETERS (8)
- PROPERTIES OF DOSIMETERS (9)
- Personal Dosimeters
- Who should wear a personal dosimeter
- Where are personal dosimeters usually worn
- Types of personnel dosimeters
- Film Badge
- Advantages And Disadvantages Of The Film Badge
- Pocket Dosimeter
- Advantages And Disadvantages Of The Pocket Dosimeter
- Thermo luminescent Dosimeters(TLD)
- Advantages And Disadvantages Of The Thermoluminescent Dosimeter
- Optically stimulated luminescence (OSL)
- Solid State
- How to wear the Radiation Dosimeter
- Thanks
-