Mean glandular dose vs breast thickness / AEC
A line graph with compressed breast thickness in centimetres on the horizontal axis and average glandular dose in milligray on the vertical axis. The measured average glandular dose curve rises upward with increasing steepness, sitting well above a straight dashed line marking what a directly proportional relationship would look like, showing that dose increases more than linearly with thickness. A second dashed curve for denser or more glandular tissue lies higher still. A horizontal dashed line marks the diagnostic reference level ceiling, which the curves approach and cross only at large thickness. An arrow shows that compression reduces thickness and therefore lowers dose.
Practice the Physics paper
FRCRX is a Part 1 Physics question bank: true/false items with explanations, timed mocks and topic analytics.