How should the collimation be set for the internal rotation of the shoulder?

In setting the collimation for the internal rotation of the shoulder, it is essential to ensure that you capture the relevant anatomical structures clearly and accurately. The correct choice involves including the shoulder and the soft tissue to the deltoid tuberosity. This area encompasses the shoulder joint, which is of primary interest in radiographic imaging during this position, and it ensures the visualization of surrounding soft tissues that may be of clinical significance.

Collimating to the deltoid tuberosity strikes a balance between including necessary anatomical landmarks while not overexposing adjacent areas that may not be required for the diagnostic purpose. This targeted approach contributes to better image quality and helps minimize radiation exposure to patients while ensuring that key structures are adequately imaged.

In contrast, other options involve a broader collimation that may not be necessary for the specific view of the shoulder in internal rotation. Over-collimating can lead to unnecessary distractions in the image or additional radiation exposure.