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Radiographic positioning of the forearm Radiographic examination of the forearm is performed using anteroposterior (AP) and lateral projections. Both projections of the forearm demonstrate the elbow joint, the radius and the ulna, and the proximal row of slightly distorted carpal bones. Technical factors
Positioning for an AP projection of the forearm
Evaluation criteria
Positioning for a lateral projection of the forearm
Evaluation criteria
Radiographic positioning of the elbow Routine radiographic examination of elbow is performed using the AP, AP oblique, and lateral projections. AP oblique projections include medial (internal) rotation and lateral (external) rotation views. The lateral projection (lateromedial view) is obtained by flexing the elbow 90º. Diagnosis of certain important joint pathological processes (such as possible visualization of the posterior fat pad) depends on 90º flexion of the elbow joint. By doing this, the olecranon process can be seen in profile, and the elbow fat pads are the least compressed. Also, by allowing a partial or complete extension, the olecranon process elevates the posterior elbow fat pad and simulates joint pathology. Technical factors
Positioning for an AP projection
Evaluation criteria
Positioning for a lateral projection
Evaluation criteria
Positioning for an AP oblique projection medial (internal) rotation
Evaluation criteria
Positioning for an AP oblique projection lateral (external) rotation
Evaluation criteria
AuntMinnie.com contributing writer November 21, 2002 Related Reading The twists and turns of hand and wrist x-ray positioning, October 15, 2002 Digit imaging requires diligent positioning, September 17, 2002 Patient positioning techniques for a lower gastrointestinal series, June 27, 2002 Patient positioning tips for a premium UGI series, April 17, 2002 Positioning techniques for quality esophagrams, March 20, 2002 Copyright © 2002 AuntMinnie.com How many degrees should the elbow be angled for an AP oblique projection and medial rotation?An AP oblique radiograph requires the elbow to be oriented 45 degrees in internal rotation. A lateral radiograph of the elbow requires the elbow to be flexed 90 degrees with the forearm and humerus laying flat on the table and the image receptor, ulnar side down on the receptor, and thumb/radial side up.
When examining a patient whose elbow is in partial flexion How should an AP projection be obtained?ARRT Registry Review. What is the purpose of performing the AP partially flexed projections of the elbow?Chapter 5. What joints should be clearly demonstrated on the AP projection of the forearm?Radiographic examination of the forearm is performed using anteroposterior (AP) and lateral projections. Both projections of the forearm demonstrate the elbow joint, the radius and the ulna, and the proximal row of slightly distorted carpal bones.
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