Question

Why should computed radiography (CR) image receptors (IR) be erased if they haven't been used?

A. Eliminate phantom artifacts.
B. Prevent a Moire effect.
C. Remove fog from background radiation.
D. Ensure dropout artifacts do not occur.

Answer 1

Computed Radiography (CR) image receptors should be erased to eliminate phantom artifacts, prevent a Moire effect, and ensure dropout artifacts do not occur.

Step-by-step explanation:

Computed Radiography (CR) image receptors (IR) should be erased even if they haven't been used for several reasons:

1. Eliminate phantom artifacts: When CR image receptors are not erased, residual images from previous exposures can appear, creating phantom artifacts and affecting the accuracy of subsequent images.
2. Prevent a Moire effect: Erasing the CR image receptors helps prevent a Moire effect, which occurs when the grid pattern of the image receptors interferes with the grid pattern of the CR system, resulting in undesired patterns and distortions in the image.
3. Ensure dropout artifacts do not occur: Dropout artifacts can occur if residual image information is combined with new exposure information. Erasing the image receptors helps prevent the occurrence of these artifacts.