gek1540tut3qb
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Modern Technologies in Health & Medical Care GEK1540 Tutorial 3 (Sem. 1, AY2014/15) Date: 29 Sept 2014 – 02 Oct 2014 Location: S11‐03‐01 (Instruction Room) Learning Objectives: (1) Familiarize with the spatial resolution in ultrasound imaging (2) Estimating the blood flow using the ultrasound technique (3) Familiarize with the concept of X‐ray and its applications (4) Demonstration of X‐ray Diagnostics Question 1 Topic: Ultrasound If using a higher frequency in ultrasound imaging gives you increased spatial resolutions, can you keep increasing the frequency until we image individual cells in the tissue? Question 2 Topic: Ultrasound A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as small as 100Hz. What is the smallest blood flow velocity detectable using this device.
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Transcript of gek1540tut3qb
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ModernTechnologiesinHealth&MedicalCareGEK1540Tutorial3(Sem.1,AY2014/15)
Date:29Sept201402Oct2014Location:S110301(InstructionRoom)
LearningObjectives:(1) Familiarizewiththespatialresolutioninultrasoundimaging(2) Estimatingthebloodflowusingtheultrasoundtechnique(3) FamiliarizewiththeconceptofXrayanditsapplications(4) DemonstrationofXrayDiagnosticsQuestion1Topic:UltrasoundIf using a higher frequency in ultrasound imaging gives you increased spatialresolutions,canyoukeepincreasingthefrequencyuntilweimageindividualcellsinthetissue?Question2Topic:UltrasoundAcardiologistusesanultrasoundscannerwithanoperatingfrequencyof3.5MHzthat can detect Doppler frequency shifts as small as 100Hz.What is the smallestbloodflowvelocitydetectableusingthisdevice.
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Question3Topic:XraysBelow is a graph of Xray emission versusphoton energy form a typical Xray tube.Explainthegraph.
Question4Topic:Radiography(XrayDiagnostics)(a) In amammogram,what percentage of incident Xrays are transmittedby4
cmofbreasttissuefor(i)20keVXrays(where=0.77cm1),and(ii)60keVXrays(where=0.21cm1).
(b) WhatisthepercentagetransmissionofincidentXrayspassingthrougha0.1cmmicrocalcification, for(i)20keVXrays(where=4.8cm1),and(ii)60keVXrays(where=0.5cm1).
(c) WhatisthebestXrayenergyfordetectingcalciumdepositsinbreastcancer?
CTKNSYAY1415
