Where should the central ray be directed for an AP Semiaxial Clavicle?

In an AP Semiaxial Clavicle projection, the central ray should be directed to the undersurface of the center of the clavicle. This positioning is crucial for obtaining an optimal image of the clavicle while minimizing superimposition of other structures.

When the central ray is directed to the undersurface of the center of the clavicle, it allows for visualization of the clavicle in its entirety, demonstrating its anatomical features and ensuring that the area of interest is effectively captured without distortion. The semiaxial technique, which usually involves angling the tube slightly upward, helps to elevate the clavicle above the first rib, improving the clarity of the image.

This specific alignment is essential in diagnostic imaging as it provides a direct view of the clavicle, which can be important for evaluating potential fractures, dislocations, or other abnormalities.