MRI of the forearm provides detailed images of bones (radius, ulna), bone marrow, muscles, tendons, ligaments, nerves, blood vessels and soft tissues. It detects fractures not seen on X-ray, tendon or ligament tears, muscle strains, nerve entrapment, infection, bone‑marrow edema, tumors and soft‑tissue masses, and joint or compartment pathology. It’s used to evaluate unexplained pain, trauma, inflammation and suspected neoplasm.

Forearm MRI requires a referral and removal of jewelry/metal. You’ll lie or sit with the arm placed in a dedicated surface coil and immobilized to prevent motion. Typical sequences are T1, T2/STIR or fat‑suppressed PD; contrast may be used for infection or tumor evaluation. Scan lasts ~20–40 minutes. Inform staff about implants, pregnancy, allergies or claustrophobia; results go to your referring clinician.

MRI cannot directly detect pain but can reveal structural causes that explain arm pain, such as nerve compression (cervical radiculopathy), disc herniation, soft-tissue injuries, fractures, tumors, or inflammation. It is especially useful when symptoms persist, worsen, or include numbness, weakness, or red-flag signs. Clinical correlation is essential because MRI may show incidental findings not actually causing the pain.

Be concerned if an MRI reveals acute abnormalities or explains worsening symptoms: new or progressive weakness, numbness, balance loss, sudden severe headache, seizures, vision/speech or cognitive changes, signs of tumor, infection, bleeding, spinal cord compression, or rapid lesion growth versus prior scans. Any contrast-enhancing or otherwise suspicious mass warrants prompt discussion with your physician or emergency care for further evaluation.

The forearm is innervated mainly by three major nerves: the median, ulnar and radial nerves. Their forearm branches include the anterior interosseous nerve (from the median), palmar cutaneous branches, the deep branch/posterior interosseous nerve and superficial radial sensory branch, plus ulnar dorsal/palmar cutaneous branches, multiple muscular branches, and the lateral antebrachial cutaneous sensory branch (from musculocutaneous).

Magnetic resonance detects nerve injury using high‑resolution MR neurography and conventional T1/T2/STIR sequences. Damaged nerves show T2 hyperintensity, enlargement, loss of normal fascicular pattern or discontinuity; contrast enhancement indicates inflammation. Secondary signs include muscle denervation—acute edema (T2/STIR bright) and chronic fatty atrophy (T1 hyperintense). MRI also identifies compression, neuromas, scarring, and helps guide management.