✍️ Written by the MedTestBD Editorial Team · Last reviewed: June 2026
What is an MRI of the Arm?
An MRI of the arm produces detailed images of the soft tissues and bones of the upper limb — including the muscles, tendons, nerves, blood vessels, and bone marrow — without using radiation. It can be performed on either arm depending on the clinical problem. MRI is far superior to plain X-ray for evaluating soft tissue injuries, nerve entrapment, and bone marrow pathology in the arm, and is often the investigation of choice when X-ray findings are normal but symptoms persist.
Why is an Arm MRI Done?
- To evaluate unexplained arm pain, swelling, or weakness not explained by X-ray
- To assess soft tissue masses — lipomas, cysts, or tumours in the arm muscles
- To detect stress fractures or bone marrow oedema not visible on plain X-ray
- To evaluate nerve entrapment or compression syndromes affecting the arm
- To assess muscle tears, haematomas, or myositis (muscle inflammation)
- To evaluate post-traumatic changes or complications after arm fractures
How to Prepare for an Arm MRI
- No fasting is required unless contrast is planned — in that case fast for 4 hours
- Remove all metal objects from both arms — watches, rings, bangles, and any metallic items
- Inform staff about any metallic implants, plates, or screws in the arm from previous fracture surgery
- Wear comfortable, loose-fitting clothing without metal fasteners — or change into a hospital gown
- Bring previous X-ray or ultrasound reports of the arm for comparison
- The arm is positioned either alongside the body or extended above the head depending on the area of interest — the radiographer will advise
⚠️ This information is for general reference only. Always consult a qualified physician before undergoing any medical test.