Three images were obtained on the same structure with a computed radiography system. Image 1 was obtained using a 48-inch source-image receptor distance (SID) and a 5-inch object-image receptor distance (OID); image 2 was obtained using a 48-inch SID and a 3-inch OID; and image 3 was obtained with a 48-inch SID, a 3-inch OID, and a larger IR. Which image will demonstrate the sharpest recorded detail?
A) Image 1
B) Image 2
C) Image 3
D) There will be no difference in recorded detail.

Question

Quizplus · Accepted Answer

Image 2 will demonstrate the sharpest recorded detail because it has the smallest OID, which reduces geometric unsharpness. The use of a larger IR in Image 3 may allow for more anatomy to be included in the image, but it will not affect the sharpness of recorded detail. Image 1 has a larger OID than Image 2, which will result in more geometric unsharpness and a decrease in recorded detail.

Three Images Were Obtained on the Same Structure with a Computed