Transcript IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY Part 16.6: Optimization of protection in fluoroscopy Practical.

IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
RADIATION PROTECTION IN
DIAGNOSTIC AND
INTERVENTIONAL RADIOLOGY
Part 16.6: Optimization of protection in
fluoroscopy
Practical exercise
IAEA
International Atomic Energy Agency
Overview
• To become familiar with quality control
tests in fluoroscopy.
• To assess the video monitor
performance
• Interpretation of results
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IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
Part 16.6: Optimization of protection in
fluoroscopy
Video Monitor performance
IAEA
International Atomic Energy Agency
Fluoroscopy - TV monitor
performance
Purpose :
• To check and set up the TV monitor of the
fluoroscopy system under normal automatic
brightness control
Equipment :
• Image quality phantom (Leeds phantom)
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TV monitor setup
• Very important element of the fluoroscopy
imaging chain: monitor with the brightness set
low can cause a high dose rate to be used
• Need to see the circle inside the square at both
high and low contrast
• Fluoro the test pattern under normal automatic
control and adjust the monitor appropriately
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TV monitor Setup
• Adjust brightness
•
contrast controls:
- optimise black and white
circles in squares
- full grey scale should be
visible
• Leave TV controls
unchanged for remaining
Image from:
tests
http://www.leedstestobjects.com/modules/products/pr
oduct_setup/file_library/SFS%20SET%20product%20
specifications.pdf
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Leeds Fluoroscopy Phantoms
Adjustment of the display monitor
Incorporates:
• a ten-step wedge with
transmission from zero to
0.9 of peak white
• two discs of unity and zero
X-Ray transmission within
squares of transmissions
0.9 and 0.08
• a lead circle
Image from:
http://www.leedstestobjects.com/modules/products/pr
oduct_setup/file_library/SFS%20SET%20product%20
specifications.pdf
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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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