In an AP axial projection of the foot, how many degrees is the central ray directed?

In an AP axial projection of the foot, the central ray is typically directed at an angle of 10 degrees toward the heel. This specific angulation is important because it helps to project the anatomy of the foot in a way that reduces the superimposition of structures and provides a clearer view of key areas, such as the metatarsals and tarsals. The angulation enhances visualization of the subtalar joint by aligning the central ray appropriately, allowing for better interpretation of potential pathologies or injuries.

Choosing a central ray angle of 10 degrees is based on standard radiographic positioning protocols that ensure optimal imaging results for the foot in this projection. The correct angulation ultimately assists in achieving a diagnostic-quality image, which is crucial for evaluating the foot's anatomy.