Quality Assurance and Fault Analysis of Radiographs Flashcards
what does ALARP stand for
as low as reasonably practicable
what should every dental practice have relating to radiographs
quality assurance programme
who is involved in the creation of quality assurance programmes
medical physics expert
what are things to check on the digital image receptors
the receptor itself and damage
image uniformity
image quality
how often should digital receptors be checked
at least every three months
what does checking the receptor image uniformity involve
expose receptor to an unattenuated xray beam and check if resulting image is uniform - ie check a consistent shade of grey across the image
what does checking the image quality of a receptor involve
take a radiograph of a test object and assess the resulting image against a baseline
what will appear if a phosphor plate is scratched
white lines
what happens if a phosphor plate is cracked
network of white lines
what happens if delamination occurs on phosphor plates
white areas around the edge
how does damage appear on film
appears as black marks due to sensitisation of radiographic emulsion
what does white scratches on film indicate
the layer of emulsion has been scraped off
what is used to test quality assurance of receptor image quality
step wedge
what is the step wedge technique
used to check image contrast, use different thickness of lead on a stick to make sure they all have different contrasts
what are the 3 parts of assessing clinical image quality
image quality rating
image quality analysis
reject analysis
