Magnetic resonance imaging/ultrasound fusion-guided sacroiliac joint corticosteroid injection in patients with axial spondyloarthritis.

Local glucocorticoid injections are used in the treatment of isolated sacroiliitis in patients with spondyloarthritis. Sacroiliac joint injections can be performed intraarticularly or periarticularly. Since the accuracy of blind injections is low, fluoroscopy, magnetic resonance imaging, computed tomography, or ultrasonography guidance are used to increase the accuracy of sacroiliac joint injections. Currently, imaging fusion software is successfully used in sacroiliac joint interventions with three-dimensional anatomic information added to ultrasonography. Herein, we present two cases of sacroiliac joint corticosteroid injections under ultrasonography-magnetic resonance imaging fusion guidance.