How should a patient be positioned for an AP projection of the sacroiliac joints?

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Study for the Clover Learning Radiography Positioning Test. Boost your skills with detailed questions, hints, and explanations. Master your radiography exam!

Multiple Choice

How should a patient be positioned for an AP projection of the sacroiliac joints?

Explanation:
A true AP view of the sacroiliac joints requires the pelvis to be neutral so the joints are parallel to the image receptor. Have the patient lie supine on the radiographic table so the pelvis remains flat and centered, minimizing rotation and distortion. Standing would tilt or rotate the pelvis and alter the joint appearance; prone would rotate the pelvis away from the IR and also distort the joints. Lying supine on the table provides the correct, reproducible geometry for evaluating both SI joints.

A true AP view of the sacroiliac joints requires the pelvis to be neutral so the joints are parallel to the image receptor. Have the patient lie supine on the radiographic table so the pelvis remains flat and centered, minimizing rotation and distortion. Standing would tilt or rotate the pelvis and alter the joint appearance; prone would rotate the pelvis away from the IR and also distort the joints. Lying supine on the table provides the correct, reproducible geometry for evaluating both SI joints.

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