What anatomical areas must be included in the collimation for clavicle imaging?

For clavicle imaging, the collimation must include the SC (sternoclavicular) and AC (acromioclavicular) joints because these joints are critical to the anatomy and function of the clavicle. Proper collimation ensures that both ends of the clavicle are adequately visualized for a complete assessment, as pathologies can involve either of these joints. Including the SC and AC joints allows for a more comprehensive view of any potential issues, such as fractures, dislocations, or degenerative changes in the clavicle while minimizing unnecessary radiation exposure to surrounding tissues.

The other options are narrower in scope or do not adequately capture the full extent of the anatomical area of interest for clavicle imaging. Focusing solely on the clavicle would miss vital aspects at both ends, while including the entire shoulder or thoracic spine would result in excessive collimation beyond what is necessary for evaluating the clavicle specifically.