Which projection best demonstrates the right sternoclavicular joint?

The projection that best demonstrates the right sternoclavicular joint is achieved by utilizing a 10 - 15 degree right anterior oblique position. This positioning is optimal because it allows for a clearer view of the right sternoclavicular joint by reducing superimposition of the surrounding anatomical structures.

When the patient is positioned in an RAO, the right sternoclavicular joint is projected away from the spine and any overlapping structures, thus providing a more focused image of the joint itself. This particular degree of rotation is sufficient to open the joint space without compromising the clarity of the surrounding anatomical landmarks.

Utilizing a 0 - 5 degree RAO may not adequately separate the joint from adjacent structures, leading to a less-than-optimal visualization. Similarly, a 15 - 20 degree LPO would also center on the left side, which is opposite of the area of interest, possibly obscuring the right sternoclavicular joint further. The 20 - 25 degree LAO would align the joint in a way that is not advantageous for proper visualization, as it would continue to introduce superimposition from nearby structures.

Thus, the selected angle of rotation allows for the most effective demonstration of the right sternoclavicular