An MRI of the lumbar spine with sacroiliac joints is a non-invasive imaging test that uses magnetic fields and radio waves to produce detailed images of the lower spine, intervertebral discs, nerve roots, ligaments, and sacroiliac joints. It detects disc herniation, nerve compression, inflammation, infection, fractures, and degenerative or inflammatory sacroiliitis. Contrast dye may be used; there’s no ionising radiation.

An MRI of the lumbar–sacral spine typically costs widely: in the United States roughly $400–3,500 (often $1,000–2,500 out-of-pocket without insurance); in India about ₹2,000–12,000; in the UK it’s often covered by public healthcare or £200–£1,000 privately. Costs rise for contrast studies, higher-field scanners, urgent appointments, and vary by location, facility and insurance.

MRI of the lumbar and sacral spine is a non‑invasive imaging test that creates detailed pictures of the lower back and sacrum to evaluate causes of low back pain, sciatica and leg symptoms. It detects herniated discs, spinal stenosis, nerve compression, fractures, infections, tumors, congenital anomalies and postoperative changes, and helps plan surgery or monitor treatment when symptoms suggest nerve involvement.

A sacroiliac joint MRI scan usually takes about 20 to 45 minutes of actual scanning. Allow extra time (15 to 30 minutes) for check‑in, changing, positioning and any contrast injection, so total appointment time may be 45 to 75 minutes. More complex protocols or additional sequences can lengthen the scan to about an hour or slightly longer.

Treatment usually begins with conservative measures: rest, activity modification, heat/ice, NSAIDs and physical therapy emphasizing core and pelvic stabilization and targeted exercises. Supportive measures include sacroiliac belts and manual therapy. If pain persists, image-guided corticosteroid injections or radiofrequency ablation of SI joint nerves may be offered. Surgical fusion is reserved for refractory, disabling cases after multidisciplinary evaluation.

A lumbar–sacral MRI scan typically takes about 20–30 minutes for a standard, non‑contrast exam. If contrast (gadolinium) is used or extra sequences are needed, imaging can take 30–60 minutes. Allow extra time for check‑in, positioning and safety screening, so the full appointment is often 45–90 minutes from arrival to finish. Check with your imaging center for exact timing.