Which radiographic landmark is most reliable to evaluate the posteroanterior (PA)projection of the abdomen for rotation?

Question

Quizplus · Accepted Answer

The ala of the ilium is the most reliable landmark to evaluate for rotation on a PA projection of the abdomen. It is a bony structure that is easily identified and relatively stable compared to other landmarks such as the xiphoid process or ASIS, which can be affected by factors such as patient positioning or body habitus. The symphysis pubis is not on the PA projection of the abdomen but may be seen on a lateral projection.

Which Radiographic Landmark Is Most Reliable to Evaluate the Posteroanterior