Final answer:
The anode heel effect, significant in radiography, is influenced by SID, with greater distances reducing its visibility, IR size, as larger receptors show more effect, and screen speed, where faster screens can lessen its appearance.
Step-by-step explanation:
The anode heel effect is a phenomenon in radiography where the intensity of the X-ray beam is greater on the cathode side compared to the anode side. This effect is influenced by various factors:
- SID (Source-to-Image Distance): The further the distance, the less prominent the heel effect because the X-ray beam has more space to diverge and even out before reaching the image receptor.
- IR (Image Receptor) size: Larger image receptors can capture more of the heel effect, especially towards the edges of the receptor where it is more pronounced.
- Screen Speed: Faster screens require less exposure time, which can sometimes reduce the visibility of the heel effect due to less overall exposure variance across the image.