Which of the following is NOT an indication of appropriate positioning for an AP supine projection of the abdomen?

In an AP supine projection of the abdomen, the ideal positioning ensures that various anatomical structures are clearly visualized for diagnostic purposes. The presence of faint shadows of the spleen suggests that the spleen is not well visualized, which is not an indication of proper positioning.

Proper positioning for this projection should exhibit symmetrical iliac wings, indicating that the patient is positioned correctly and evenly on the table. Visible margins of the kidneys are also important, as they confirm that the kidneys are included in the field of view, contributing to a comprehensive abdominal examination. Additionally, including the inferior liver in the projection is essential, as this is a significant organ in abdominal imaging that provides vital information about the patient's health.

Thus, the absence of a clear view of the spleen, as indicated by faint shadows, does not meet the criteria for appropriate positioning because it limits the diagnostic quality of the image. A well-positioned AP supine abdomen should aim to demonstrate the spleen's silhouette more clearly, along with the other mentioned structures.