In which orientation can a forearm scan be performed?

The correct answer is that a forearm scan can be performed in an anteroposterior (AP) or posteroanterior (PA) orientation. This orientation is critical for obtaining accurate measurements of bone density in the forearm, as it allows for a clear view of the radius and ulna bones that are commonly assessed for conditions like osteoporosis.

When performing a bone density scan, particularly in the forearm, the AP view provides a straightforward representation of the bones in that area, allowing for precise analysis of bone mineral density. The PA view, while somewhat less common for forearm assessments, can also provide useful information depending on the positioning of the patient and the specific protocols used.

Other orientations such as lateral or transverse planes are either not standard or are less effective for forearm assessments, which is why they are not used as primary scanning methods in this context. The combination of the AP and PA orientations ensures effective evaluation by targeting the most relevant anatomical structures involved in bone density analysis.