Transcript IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY Part 15.4: Optimization of protection in radiography Practical.

IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
RADIATION PROTECTION IN
DIAGNOSTIC AND
INTERVENTIONAL RADIOLOGY
Part 15.4: Optimization of protection in
radiography
Practical exercise
IAEA
International Atomic Energy Agency
Overview
• Subject matter : quality control of
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general radiography system
Step by step procedure to be followed
to implement the considered QC test
mA and Exposure time linearity and
reciprocity
Timer accuracy
Interpretation of results
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15.4: Optimization of protection in radiography
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IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
Part 15.4: Optimization of protection in
radiography
mA and Exposure time linearity and reciprocity
IAEA
International Atomic Energy Agency
What Minimum Equipment is Needed?
• Electronic device (multi-function meter) to
measure :
• exposure time
• mA
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Timer Accuracy (I)
Method :
• Set 70 kVp, 200 mA
• Measure time at all clinically used time
settings
• Calculate error between set and actual time
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Timer Accuracy (IV)
Analysis :
• Actual time should be within  5% of set
time, or  1 pulse (single phase, short
exposures)
Frequency :
• acceptance, timer maintenance, annual
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Where to Get More Information
Quality Control in Diagnostic Imaging, Gray JE,
Winkler NT, Stears J, Frank ED. Available at no
cost. http://www.diquad.com/QC%20Book.html
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