40 patients with low back pain due to sacroiliac joint arthritis were randomized to receive a singular steroid/anesthetic injection with the aid of either ultrasound or fluoroscopic guidance. The purpose of this study was to compare differences in efficacy (pain, disability), accuracy (intraarticular vs. periarticular needle placements), and patient discomfort/satisfaction throughout three-month follow-up. Results demonstrated that all between-group comparisons made for pain, disability, opioid consumption, and accuracy were comparable at all follow-up points.