Upper Back (Thoracic Spine) MRI (without contrast)

What it is

The thoracic spine is the stiffest part of the back. The ribs attach here and hold it relatively fixed, which is why discs in this region wear out and herniate far less often than they do in the neck or the lower back. That changes what an MRI of this region is usually looking for. It is less often a search for a slipped disc and more often a search for something that has weakened or invaded a vertebra — a fracture that has collapsed the bone, a tumor deposit, an infection — or for a reason the spinal cord is not transmitting properly at that level. Because the cord runs the full length of the thoracic spine, trouble here tends to produce symptoms in both legs and a band of altered sensation around the trunk, rather than one-sided leg pain.

Why it is done

• To investigate a compression fracture of a thoracic vertebra, common after a fall or where bone has thinned
• To look for pressure on the spinal cord causing weakness, numbness or altered sensation below the level of the problem
• To search for tumor or infection in the vertebrae when back pain arrives with fever, weight loss, or a history of cancer
• To assess the cord itself for inflammation or other disease
• To examine mid-back pain that has persisted and has not been explained

What to expect

The screening for metal implants and devices is the same as for any MRI and happens before you enter the room. The scan is done lying flat inside the tube, generally for twenty to forty minutes, with hearing protection because it is loud. One difference from other regions: breathing and the heartbeat move this part of the body more than they move the lower back, so the sequences are arranged to cope with that, and calm, regular breathing helps the images. Nothing is injected in this version, there is no preparation for most people, and you can leave and drive immediately afterward.

Questions worth asking

• Thoracic MRI is often ordered together with cervical or lumbar MRI. Each region is its own code and its own charge — ask how many regions the order covers and get the estimate itemized.
• If the concern is a compression fracture, ask whether X-ray or CT was considered first and how the prices compare.
• Confirm prior authorization is approved for the thoracic region specifically, since approvals are issued per region.
• Ask whether the facility quotes a single all-in price or separate technical and professional charges, and get whichever figure in writing.