When imaging a trauma elbow that is in acute flexion, how is the central ray directed in order to image the distal humerus?
perpendicular to the mid elbow joint
perpendicular to the humerus
perpendicular to the forearm
angled 45 degrees towards the shoulder joint
perpendicular to the humerus
Rationale: Situations of trauma elbows may present with the patient unable to fully extend the arm. Two AP projections may be acquired, one with the forearm parallel to the image receptor and the CR perpendicular to the forearm and the second with the humerus parallel to the image receptor and the CR perpendicular to the humerus. A 90 degree lateral is also taken in the most tolerable position possible.
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