MR扩散张量成像在膝关节前交叉韧带的初步应用

发布时间：2018-07-11 18:21

本文选题：膝关节 + 前交叉韧带　；参考：《放射学实践》2017年10期

【摘要】：目的:探讨采用3.0T磁共振对膝关节前交叉韧带进行磁共振扩散张量成像(DTI)及纤维束示踪成像(FT)的可行性。方法:对25名健康志愿者进行膝关节DTI检查,男15例,女10例,年龄21~40岁,平均34.6岁。采用单次激发自旋回波平面成像序列,在工作站进行纤维束示踪三维模拟成像,计算前交叉韧带的纤维束长度及平均FA值、ADC值,比较不同性别的FA值及ADC值差异,并分析同一操作者在不同时间测量结果的一致性。结果:25名受检者中16例前交叉韧带显示三维纤维束结构,4例显示多束,5例未显示规则的纤维束。所显示的平均纤维长度为(13.79±1.75)~(25.43±3.37)mm.。全部受试者前交叉韧带平均FA值为0.457±0.058,平均ADC值为1.419±0.289,无性别差异。比较同一测量者在不同测量时间的FA和ADC测量值,其可信度和组内相关系数均较好。结论:采用3T MR成像系统能成功完成正常前交叉韧带DTI和DTT,并可显示正常前交叉韧带的双束结构。
[Abstract]:Objective: to investigate the feasibility of using 3.0T magnetic resonance imaging (Mr) for diffusive Zhang Liang imaging and tracer imaging (FT) of anterior cruciate ligament of knee joint. Methods: DTI examination was performed in 25 healthy volunteers, including 15 males and 10 females, aged from 21 to 40 years (mean 34.6 years). Single excitation spin echo plane imaging sequence was used to simulate the fiber bundle tracer in workstation. The fiber bundle length and average FA value of anterior cruciate ligament (ACL) were calculated, and the difference of FA value and ADC value between sexes were compared. The consistency of the measurement results of the same operator at different time was analyzed. Results among the 25 subjects, 16 cases showed three dimensional fibrous bundle structure in anterior cruciate ligament (ACL) and 5 cases showed irregular fibrous bundle in 5 cases. The average fiber length was (13.79 卤1.75) ~ (25.43 卤3.37) mm. The average FA value of anterior cruciate ligament was 0.457 卤0.058 and the average ADC value was 1.419 卤0.289 in all subjects. The reliability and intra-group correlation coefficient of FA and ADC measured by the same measure were better. Conclusion: using 3T Mr imaging system can successfully complete DTI and DTT of normal anterior cruciate ligament and can display the double bundle structure of normal anterior cruciate ligament.
【作者单位】：南京大学医学院附属鼓楼医院放射科;
【基金】：南京市医学科技发展项目(YKK14071)
【分类号】：R445.2;R686.5

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