Bisecting angle technique patient holds the film or sensor with his finger short cone magnified...
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Transcript of Bisecting angle technique patient holds the film or sensor with his finger short cone magnified...
![Page 1: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/1.jpg)
![Page 2: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/2.jpg)
Bisecting angle technique
• patient holds the film or sensor with his finger
• short cone magnified apexes
![Page 3: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/3.jpg)
Parallel technique
• film/sensor holder• long cone
![Page 4: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/4.jpg)
•small focal spot 0.7mm• small unsharpness
•optional long cone• small unsharpness
geometric requirements for good images are met
Image quality
![Page 5: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/5.jpg)
Image quality
• High-voltage generator
• constant potential (DC)
• X-ray generation• high operating frequency (66 kHz) 25% less radiation to patient
compared to conventional AC generators
shorter exposure times improved contrast is not affected by line voltage
variations readiness for digital systems
![Page 6: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/6.jpg)
Kilovolts and image quality
50 kV
60 kV
70 kV
• lower anode voltage higher contrast, more
suitable for endodontic, apex and bone structure diagnosis
• medium anode voltagesboarder grey scale, suitable
for caries detection
• higher anode voltages longest grey scale spectrum
for periodontal disease diagnosis
![Page 7: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/7.jpg)
Milliampers and image quality
•with variable milliamperes (2 - 8 mA) we can take the whole advantage of the modern digital imaging systems and new high-speed films
![Page 8: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/8.jpg)
Adjustable settings
• adjustable kV setting (50, 53, 55, 57, 60 ,63, 66, 70)
• different diagnostic needs are fulfilled
• adjustable mA (2-8 mA)
• maximum dose reduction possible with modern digital sensor systems and high-speed films
![Page 9: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/9.jpg)
•smooth movements•drift-free positioning•no vibrations
easy, quick and accurate positioning
X-ray arm
![Page 10: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/10.jpg)
•non-symmetric form•tubehead and cone have a common smooth plane
easy targeting along the smooth surface
close to the patient’s chest in occlusal images
X-ray tube design
![Page 11: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/11.jpg)
•66 preprogramed quick settings
•modality selection to choose film, imaging plate or sensor
•density setting •adult/child selection•periapicals for different teeth
•Occlusal
•bite-wing / endo
Quick setting allow ALWAYS to have right exposure values for individual cases
Controls
![Page 12: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/12.jpg)
Control panel options
•hand held control panel•remote exposure station
all controls easily at hand for exposure
![Page 13: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/13.jpg)
Standard wall-mount
• 4 extension arm lengths
• reach 1525 – 1975 mm
• special lengths available with custom order up to 2300 mm
![Page 14: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/14.jpg)
Other mounting alternatives
•dental unit mount•mobile base mount•ceiling mount•ceiling mount with
operating light•floor column mount•single stud mount•pass-through mount
![Page 15: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/15.jpg)
The End
![Page 16: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/16.jpg)
Imaging techniques
The smaller the X-ray tube focus the smaller unsharpness
small focus large focus
small unsharpness large unsharpness
![Page 17: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/17.jpg)
Imaging techniques
The shorter the object-film distance the smaller the geometric unsharpness
small unsharpness
short
large unsharpness
long
![Page 18: Bisecting angle technique patient holds the film or sensor with his finger short cone magnified apexes.](https://reader031.fdocuments.us/reader031/viewer/2022032200/56649ce45503460f949b0d55/html5/thumbnails/18.jpg)
Imaging techniques
Geometric unsharpness and magnification decrease with a long cone
short cone
long cone
unsharpness
small unsharpness
less magnification