How much CR angulation is required for a scapular Y projection?

In a scapular Y projection, the central ray (CR) is directed perpendicular to the film or imaging receptor. This positioning is essential as it allows for a proper view of the scapula and the surrounding structures, particularly when evaluating for dislocations or fractures. The scapula is positioned in a way that it primarily faces the receptor, whereby the CR can travel straight into the scapula without any need for angling.

Using angulation in this case would distort the image and interfere with the clarity of the anatomical structures being examined. Therefore, for the scapular Y projection, there is no central ray angle required, ensuring that the true anatomy is displayed accurately on the radiograph.