This study aims to if quantitative MR DTI technology combined with conventional MR can be applied to increase diagnostic efficiency and improve the diagnostic accuracy for lateral lumbar spinal canal stenosis in clinical. By measuring 99 patients, we found in extraspinal sub-regions of Lumbar nerve root, imaging findings of nerve edema, increased diameter and decreased FA values have an ideal diagnostic performance in LLSCS. Besides, among all include parameters, nerve edema demonstrated the best diagnostic performance. Therefore, conventional MR combined with quantitative MR DTI/DTT has a good performance for visualizing and quantitative diagnosis in lateral lumbar spinal canal stenosis.
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