Sacroiliac Joints X-Ray Oblique
Objective
Direct en-face visualisation of the sacroiliac joints. Complementary to the standard AP in suspected sacroiliitis (ankylosing spondylitis, HLA-B27+, seronegative arthropathies).
Quality criteria
Sacroiliac joint visualised en face with open joint space.
Sharp articular margins (iliac and sacral aspects).
Bilateral symmetric comparison.
Common errors
Insufficient angulation — joint not en face, joint space not visible.
Excessive angulation — projection too tangential.
Unilateral examination without contralateral comparison.
Paziente supino. Ruotare il paziente di 25–30° portando il lato da esaminare verso il detettore (obliqua anteriore), sollevando…
Full card in the app
Positioning, centring, DR/CR parameters and practical notes
