CAMRT Radiography Practice Exam

What correction is necessary if the pisiform is more anterior than the scaphoid on a lateral wrist image?

1. Rotate the hand and wrist externally

2. Rotate the hand and wrist internally

3. Adjust the angle of the x-ray tube

4. Alter the exposure time

The correct answer is: Rotate the hand and wrist internally

When the pisiform appears more anterior than the scaphoid on a lateral wrist image, this indicates a positional error in the imaging of the wrist. The correct adjustment in this situation is to rotate the hand and wrist internally. In a proper lateral wrist view, the scaphoid, which is more centrally located, should align with the pisiform, which is located on the ulnar side of the wrist. If the pisiform is projected more anteriorly, it suggests that the wrist is not positioned correctly, with the palmar or radial side rotated more forward. By rotating the hand and wrist internally, the scaphoid will move into a more appropriate position, allowing for better visualization of both the scaphoid and pisiform in the standard lateral view. Adjusting tube angles or exposure times does not address the specific issue of the wrist's positioning and will not correct the alignment of the pisiform relative to the scaphoid. Therefore, the internal rotation provides the necessary corrective action to achieve an accurate lateral representation of the wrist anatomy.