Fig. 8

Oblique technique fluoroscopic view (A) and graphical illustration (B). In the oblique approach, the C-arm is rotated in a contralateral manner until the 2 joint lines become superimposed. Then, one would target the inferior segment of this superimposed image, as the superior sacroiliac (SI) joint space is composed of interosseous ligaments. Antero-posterior technique fluoroscopic view (C) and graphical illustration (D). In the anterior–posterior (AP) approach, image is taken with 5°–15° 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.