Systematic approach to interpretation of the lumbar spine MR imaging examination.

The lumbar spine MR imaging study is one of the most frequently ordered MR imaging examinations in the United States. Numerous possible causes exist for low back pain, which contributes to the diagnostic challenge that imagers face in arriving at clinically relevant diagnoses from the anatomic information provided by MR imaging. In this article, the authors suggest a systematic approach to MR imaging interpretation. The evaluation may be altered, based on individual preferences and the specific clinical scenario. The author also highlights commonly encountered disease processes, pertinent MR imaging anatomy, and some common diagnostic pitfalls. Normal and abnormal spine MR images are also shown.