For an AP abdominal projection (lateral decubitus position),
1)the right hemidiaphragm and iliac wing must be included to demonstrate intraperitoneal air.
2)position the shoulders and the ASISs at equal distances from the IR.
3)obtain the exposure on expiration.
4)position the patient's right side adjacent to the imaging table or cart.
A) 1 and 2 only
B) 1 and 3 only
C) 2 and 4 only
D) 1, 2, and 3 only

Question

Quizplus · Accepted Answer

For an AP abdominal projection in the lateral decubitus position, including the right hemidiaphragm is crucial for demonstrating intraperitoneal air, as air will rise to the highest point. Positioning the shoulders and ASISs at equal distances from the image receptor ensures the abdomen is not rotated. Obtaining the exposure on expiration is incorrect; it should be on inspiration to ensure the diaphragm is at its highest position, but in the context of detecting free air under the diaphragm, a full expiration can be useful to maximize the visibility of any potential free air. Therefore, the inclusion of "obtain the exposure on expiration" as a correct practice in this context is a misunderstanding, and the correct practices are ensuring the right hemidiaphragm and iliac wing are included and positioning the shoulders and ASISs equidistant from the IR.

For an AP Abdominal Projection (Lateral Decubitus Position)