腰椎椎间盘MRI T2加权信号强度变化的探讨

目的：探讨腰椎间盘Ｔ２加权ＭＲＩ信号变化与年龄、椎间隙位置和椎间盘突出的关系。材料和方法：本文收集了１６５例患者（８２５只腰椎间盘），其中正常６１９只，突出２０６只，２０１只手术证实。患者分为正常和突出两组，每组分６个年龄段；信号强度分为三型：强、不规则和低三型。检查方法均采用ＳＥ程序（ＴＲ２０００ｍｓ，ＴＥ４０，８０ｍｓ）。全部资料经统计学处理。结果：在正常椎间盘，年龄影响主要在２０岁组与３０岁至７０岁以上组，３０岁组与５０至７０岁以上组之间；椎间隙位置影响主要在腰（４－５）与腰（１－２，２－３，３－４），腰５骶１与腰１－２，２－３，３－４之间。在伴有突出的椎间盘，年龄影响主要在２０岁组与３０，６０及７０岁以上组之间：椎间隙位置影响主要在腰（４－５）与腰５骶１之间。结论：两组椎间盘信号变化均与年龄和椎间隙位置有关，各型信号的椎间盘均可发生突出。

Signal Intensity Study on T_2 Weighted MRI of the Lumbar Discs

Discussing the associated relations among the signal intensities of lumbar disc on T2-weighted MRI, age, intervertebral space and disc herniation. Materials and Methods:MRI was performed for 165 patients (825 lumbar discs), including 619 normal discs and 206 herniated discs (201 herniated discs were surgically proved). These patients were divided into two groups: normal and herniated. Every group had six age ranges.The signal intensities were divided into three types: high,irregular and low.We used SE sequence routinely (TR2000ms,TE40,80ms).Statistically, we analysed all of data. Results: In normal discs, there were obvious differences in age:ranged 20-year-old group to 30 to over 70-year-old groups, 30-year-old group to 50 to over 70-year-old groups, and in intervertebral spaces:L4-5and L5S1 to L1-2;2-3,3-4.In herniated discs, there were also obvious differences in age:range 20-year-old group to 30, 60 and over 70-year-old groups, and in intervertebral space: L4-5 to L5S1. Conclusion: Lumbar discs signal intensity changes on T2-weighted MRI related to age and intervertebral space, not only for normal discs, but also herniated discs. Each type of signal intensity of disc may result in herniation.