What degree and direction of central ray angulation is used for an AP axial weight-bearing projection of the feet?

For an AP axial weight-bearing projection of the feet, a central ray angulation of 10-15 degrees toward the heel is employed to properly visualize the anatomy of the foot. This angling allows for improved alignment of the metatarsals and tarsal bones, effectively minimizing distortion and demonstrating the relationships between the various structures in the foot.

In this projection, angling the central ray toward the heel helps project the rays through the joints and bones of the foot in a way that reduces superimposition. The upward projection associated with this angle enhances the visualization of important anatomical landmarks such as the navicular bone and the first and second metatarsal heads, allowing for more accurate assessments of any potential pathologies.

Using this specific degree of angulation also helps to create a clearer image during the X-ray process, which is crucial in a weight-bearing position where there may be increased pressure and potential for misalignment. Proper technique ensures optimal image quality, which is vital in diagnostic radiology for evaluating foot conditions, such as fractures, arthritis, or structural abnormalities.