What is the position of the wrist when performing the PA oblique projection?

The position of the wrist during a PA oblique projection is specifically set so that the coronal plane of the wrist is at a 45° angle to the image receptor (IR), with the anteromedial surface resting against the IR. This positioning is crucial because it allows for optimal visualization of the carpal bones and the joints.

When the wrist is placed in this configuration, it creates the necessary oblique view that enhances the clarity of the structures being examined. The 45° angle helps to separate overlapping bones, making it easier to identify any abnormalities or injuries.

In contrast, if the wrist were positioned perpendicular to the IR, it would not provide the required oblique view and would instead display the wrist in a direct frontal projection. Similarly, a transverse alignment to the IR or positioning parallel to it would not achieve the desired effect of showcasing the wrist's anatomy effectively. Therefore, the correct positioning at a 45° angle with the anteromedial surface against the IR is essential for accurate imaging in a PA oblique projection.