Final answer:
The AP axial projection of the pulmonary apices requires the CR to be directed 15 degrees cephalically to visualize the uppermost portions of the lungs for conditions like tuberculosis.
Step-by-step explanation:
The AP axial projection for the pulmonary apices is a radiographic view where the central ray (CR) is directed cephalically (toward the head) at a 15-degree angle. This angle helps in the clear visualization of the lung apices, which are the uppermost portions of the lungs. It is important to radiographically assess these areas for conditions such as tuberculosis, which could present as infiltrates or caving formations, as indicated by findings such as those described with bilateral pulmonary infiltrate and caving formation in the right apical region.