A radiograph of an AP axial (Taylor)"outlet" projection reveals that the obturator foramina are not symmetric.What type of positioning problem is present on this radiograph?

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The AP axial (Taylor) "outlet" projection is designed to demonstrate the pubic and ischial bones, as well as the obturator foramina. If the obturator foramina are not symmetrically demonstrated, it indicates a rotation of the pelvis, which is a common positioning problem with this projection. Tilting of the pelvis and off-center CR can also contribute to an asymmetric appearance, but rotation is the most likely cause. Fracture of the pubis or ischium would be visible as a bony abnormality rather than a positional problem.

A Radiograph of an AP Axial (Taylor)"outlet" Projection Reveals That