Which bone is primarily demonstrated in the anteroposterior (AP) axial projection (Towne method) of the skull?

The anteroposterior (AP) axial projection, commonly known as the Towne method, primarily focuses on the occipital bone. This technique is designed to visualize this bone in detail, particularly the foramen magnum and the occipital condyles, which are important anatomical features located at the base of the skull.

When performing the Towne projection, the patient's head is positioned so that the X-ray beam is angled appropriately to show the occipital bone without superimposing other structures. This projection allows radiologists to assess the integrity and condition of the occipital bone, which is crucial for diagnosing various pathologies, such as fractures or tumors in that region. The alignment and angling necessary in the Towne method specifically enhance the visibility of the occipital features, solidifying its importance in this imaging technique.