Lumbar MRI measurement in normal adults and its clinical relevance
Abstract：AIM: To provide the imaging anatomic data for replacement of the prosthetic disc nucleus (PDN).METHODS: The sagittal diameter and horizontal diameter of the nucleus pulposus, and the anterior, median and posterior heights of the intervertebral disc were measured in the lumbar MRI T2 images in 56 normal subjects(44males and 12 females).RESULTS: No statistical difference was found in all measurements between males and females in the study ( t = 0. 84, P ＞ 0. 05) . The sagittal diameters of the nucleus pulposus were ＞ 12 mm in all the lumbar levels, but the percentage of the sagittal diameter ＞ 24 mm was 23.2% at L2～3, 21.4% at L3～4, 21. 4% at L4-5 and 16. 1% at L5 - S1, respectively. In addition, the percentage of the posterior height of intervertebral disc ＞ 5 mm and ＜ 9 mm was 85.7% at L2～3, 82. 1% at L3～4, 82.1% at L4～5, and 58.9% at L5-S1, respectively. The percentage of the posterior height ＞ 9 mm was 0% at L2 ～3, 1.8% at L3～4, 1.8% at L4 ～5, and 3.6% at L5 - S1, respectively.CONCLUSION: One single PDN device is suitable for most patients and the commonly chosen height of the device is 5 mm or 7 mm of PDN.
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Publication Date：2004-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：2( 4112-4113 )