CAMRT Radiography Practice Exam

To achieve a true lateral view of the elbow in a radiograph, which positioning detail is crucial?

1. Forearm fully pronated

2. Humerus parallel to the image receptor

3. Wrist in a neutral position

4. Elbow flexed at 90 degrees

The correct answer is: Elbow flexed at 90 degrees

Achieving a true lateral view of the elbow is essential for proper visualization of the joint and surrounding structures. The critical detail in positioning is having the elbow flexed at 90 degrees. This angle places the humerus and forearm in a plane that is perpendicular to the image receptor, ensuring that the structures of the elbow are clearly delineated and that there is minimal superimposition of surrounding anatomy. When the elbow is flexed at 90 degrees, the olecranon process of the ulna is well demonstrated, and it allows for an optimal view of the joint space. This positioning detail aids in visualizing the fat pads, which can be indicative of trauma or other pathologies. Other positioning factors might assist in obtaining a good image, but the 90-degree flexion is paramount for achieving the desired lateral view of the elbow.