Ultrasound Versus Fluoroscopic Guided Sacroiliac Joint Injection In Patients With Chronic Sacroiliac Joint Pain

Inclusion Criteria: * Clinical diagnosis of sacroiliitis. * At least 3 positive physical examination maneuvers \[FABER (flexion, abduction, and external rotation), POSH (posterior shear), REAB (resisted abduction), Fortin's finger test\], * Moderate to severe pain (NRS pain score ≥ 3/10) refractory to oral anti-inflammatory. * Age from 18ys to 60ys. Exclusion Criteria: * Ages less than 18 or more than 85 years. * Body Mass Index (BMI) above 35 kg/m2. * A diagnosis of severe anxiety or depression and other psychological disorders. * Allergy to local anesthetics or steroids and pregnancy. * Multiple comorbidities (renal , hepatic, cardiac). * Coagulation disorder as bleeding tendency and platelet dysfunction. * Contraindication for prone position or radiological exposure. * Patient refuse . * Pain suggestive of bilateral sacroiliac joint involvement (it would have been difficult to assess pain and disability secondary to each SIJ).