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RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY

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. Overview.

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RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY

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  1. IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology RADIATION PROTECTION INDIAGNOSTIC ANDINTERVENTIONAL RADIOLOGY Part 16.6: Optimization of protection in fluoroscopy Practical exercise

  2. Overview • To become familiar with quality control tests in fluoroscopy. • To assess the video monitor performance • Interpretation of results 16.6: Optimization of protection in fluoroscopy

  3. IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology Part 16.6: Optimization of protection in fluoroscopy Video Monitor performance

  4. 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) 16.6: Optimization of protection in fluoroscopy

  5. 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 16.6: Optimization of protection in fluoroscopy

  6. 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 tests Image from: http://www.leedstestobjects.com/modules/products/product_setup/file_library/SFS%20SET%20product%20specifications.pdf 16.6: Optimization of protection in fluoroscopy

  7. 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/product_setup/file_library/SFS%20SET%20product%20specifications.pdf 16.6: Optimization of protection in fluoroscopy

  8. 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 15.3: Optimization of protection in radiography

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