[Functional MRT of the LS in an open magnet system--the initial results]

Description of the procedure and first results with functional MRI of the lumbar spine for the investigation of discoligamentous instability.

21 patients--11 female and 10 male--were studied with rapid True-FISP- and FLASH sequences. With the intention to document movements in maximal ante- and retroflexion a special kidney belt was used containing an inserted multi-purpose flexible coil. With this approach reproducible functional studies can be obtained.

Movements in ante- and retroflexion could be performed manually and gradually without technical limitation of restrictions due to the equipment. The location of a patient's pain was determined by indication from the patient and correlated with the finding on the functional MR images. In 71% of patients a gain of information was obtained with regard to discoligamentous instability of the lumbar spine when compared to earlier studies (CT, MRI in neutral position).

Functional MRI of the lumbar spine can contribute additional segmental information and contribute to further therapy planning. With this method discoligamentous instability can be documented, which is less likely with static MRI in a closed MR system.