What degree of body rotation should be used for an AP shoulder image, Grashey method, when positioning an erect sthenic patient?

For the Grashey method of obtaining an AP shoulder image, the appropriate degree of body rotation for an erect sthenic patient is between 35 to 45 degrees. This specific method requires the patient to be rotated toward the affected shoulder to open up the glenohumeral joint space. By rotating within this range, you can achieve optimal visualization of the joint, ensuring that the glenoid cavity is perpendicular to the film and the humeral head is clearly defined.

The alignment from this rotation allows for a better diagnostic image, particularly focusing on the articulation between the humerus and the glenoid of the scapula. This positioning helps to minimize superimposition of surrounding structures, enhancing the clarity of the shoulder joint details for examination.