What is the definition or description of: lumbosacral spine mri?

Magnetic resonance : Mri (magnetic resonance imaging) is an imaging modality that does not use x-rays. It allows for detailed examination of the lumbo-sacral spine in three-dimensions. This modality is particularly useful for examining the spine for herniated discs, spinal stenosis (narrowing), or spinal tumors. This information is particularly useful if surgery is necessary. These studies are done as an outpatient.

Lumbar spine MR: A particular imaging technique that allows a physician to view the nerves in the lower back in reference to the disc spaces, joints, ligaments at the respective lumbar and sacral vertebral levels.