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 greatest size distortion?
A) Image 1
B) Image 2
C) Image 3
D) There will be no difference in size distortion.

Question

Quizplus · Accepted Answer

Size distortion (magnification) in radiographic imaging is influenced by the source-image receptor distance (SID) and the object-image receptor distance (OID). The greater the OID, the more the size distortion. Since Image 1 has the largest OID (5 inches), it will demonstrate the greatest size distortion.

Three Images Were Obtained on the Same Structure with a Computed