In an AP axial projection of the sacrum, the central ray is angled by how many degrees?

In an AP axial projection of the sacrum, the central ray is angled 15 degrees cephalic. This specific angling is important as it helps to open up the sacral curvature and reduces foreshortening, providing better visualization of the sacral anatomy. The 15-degree cephalic angle aligns the beam more favorably with the anatomy of the sacrum, ensuring that the image captured will have optimal detail and clarity.

This technique helps in obtaining a satisfactory image by projecting the sacrum into a more acceptable plane for visualization. It is essential for radiographers to apply the correct angulation to avoid issues related to distortion and to enhance diagnostic examination of sacral pathologies or other related conditions. Understanding and applying the appropriate angles is a fundamental skill in radiology, contributing significantly to the quality of patient care and image interpretation.