摘要
目的评价 MR 扩散张量成像(DTI)在椎间盘纤维环病变中的临床应用价值。方法对正常组(10例),腰椎间盘突出(24例)和脱出患者(22例)共56例受检者的腰椎间盘行轴面 DTI,后处理成平均扩散系数(DCavg)图、各向异性分数(FA)图和纤维环示踪(FT)图。观察纤维环的形态和完整性,测量正常组和腰椎间盘病变患者纤维环后缘以及 FT 图发现断裂处的 DCavg 值和 FA 值,比较正常组与纤维环后缘未断裂组及缘断裂组的 DCavg 值和 FA 值的差异。结果正常组纤维环在DCavg 图和 FA 图上呈连续完整的环形结构,DCavg 值和 FA 值均匀,DCavg 值为(0.34±0.13)×10^(-9)mm2~/s,FA 值0.64±0.22,FT 图显示纤维环形态完整;纤维环后缘未断裂组的 DCavg 值为(0.29±0.10)×10^(-9)mm2~/s,FA 值为0.53±0.22,与正常组差异无统计学意义(P>0.05);腰椎间盘突出患者中的7例,脱出患者中的9例共16例 FT 图发现纤维环后缘断裂、不连续,断裂处的DCavg 值明显升高(1.01±0.10)×10^(-9)mm2~/s,FA 值则明显降低(0.15±0.03)(P<0.01)。结论DTI 能够无创的显示纤维环的形态和完整性,发现纤维环是否断裂和断裂的位置,是常规 MR 检查的有效补充。
Objective To evaluate the clinical value of the diffusion tensor imaging （DTI） in lumbar disc annulus fiber＇s diseases. Methods Fifty six subjects including normal volunteer （ n = 10）, patients with lumbar disc herniation （LDH） （n = 24 ）, and with herniated intervertebral disc （HID） （n = 22） were performed with MR scan. The DTIs were obtained in each subject. The DTI source images were sent to the work station and postprocessed Fiber Tracking （FT） picture, DCavg picture, and FA picture. Results The normal disc annulus fibrosus presented a continuous and integrity circulus in FA picture and DCavg picture, the DCavg value and FA value were uniform,DCavg was（0. 34 ±0. 13）×10^-9mm^2/s; FA was 0.64 ± 0. 22. FT picture demonstrated the annulus fibrosus＇ appearance was continuous and integrity. The DCavg value and FA value in LDH group was （0. 29 ±0. 10）×10^-9mm^2/s and 0. 53 ±0. 22, they had no significant difference with normal group（P 〉0. 05）. Seven cases in LDH group and 9 cases in HID group were found in FT picture. The mean DCavg value in annulus fibrosus disruption was significantly larger （1.01 ± 0. 10）×10^-9 mm^2/s and the mean FA value （0. 15 ± 0. 03 ）was significantly smaller than those in normal place （P 〈 0. 01 ）. Conclusion DTI can noninvasively display the lumbar disc anulus fibrosus＇s morphous and integrity and demonstrate anulus fiber disruption . As an effective supplement of conventional MRI, DTI can offer a precise guidance for treatment.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2007年第10期1100-1103,共4页
Chinese Journal of Radiology
关键词
椎间盘移位
磁共振成像
Intervertebral disk displacement
Magnetic resonance imaging
