This study aims to investigate if quantitative MR diffusion tensor imaging (DTI) technology can be applied to quantitatively evaluate the potential L5/S1 spinal nerve degeneration in patients with lumbosacral transitional vertebrae. By quantitative evaluating 52 patients, we found the L5/S1 spinal nerves' DTI FA values showed lower in type Ⅱ-Ⅳ LSTV cases while the nerves run through the bony articulation between the vertebra and sacrum. Therefore , quantitative MR DTI has a good performance for quantitative diagnosis of LSTV with Bertolotti's syndrome.
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