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Anteroposterior technique fluoroscopic view (A) and graphical illustration (B). In the anteriorposterior (AP) approach, image is taken with 5–15 degree cephalad tilt from the vertical of the fluoroscopy machine reveals a joint with 2 separately visible anterior and posterior joint lines. The anterior and posterior parts of the sacroiliac (SI) joint were delineated as lateral and medial joint spaces, respectively.
