脑干白质纤维束磁共振扩散张量成像研究  

Diffusion Tensor MR Imaing of the White Matter Fiber Tracts of the Brainstem

作　　者：洪楠[1] 孙治国[1] 蒋全胜[1] 刘涛[1] 

机构地区：[1]北京大学人民医院放射科,北京100044

出　　处：《中国医学影像技术》2002年第8期749-751,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的　使用磁共振扩散张量成像方法对脑干白质束进行研究。方法　 3 0名健康志愿者进行MR检查 ,检查包括常规T1WI ,T2WI以及扩散张量序列。结果　在脑干不同解剖水平 ,锥体束、锥体交叉、内、外侧丘系在各向异性 (FA)图像上均显示为高信号 ,在彩色张量图像上分别显示为红色 (横向走行 )、蓝色 (上下走行 )和绿色 (前后走行 )的纤维束 ,而这些结构在常规T1WI、T2WI上均不能得到显示。Purpose To evaluate the diffusion tensor MRI in the demonstration of white matter tracts of the brainstem.Methods Thirty healthy volunteers underwent MR examination,which included conventional T1WI,T2WI and diffusion tensor imaging. Results The pyramid,pyramidal decussation,medial and lateral lemniscus were seen as hyperintensity bundles on fractional anisotropy (FA) images at different anatomic levels of the brainstem. Color tensor images were used to analyse the white matter tracts, in which red, blue and green represented mediolateral,anteroposterior and superoinfeiror orientation respectively, but these structures could not be seen on conventional T1WI and T2WI. Conclusion Diffusion tensor imaging can demonstrate the white matter tracts of the brainstem noninvasively.

关 键 词：脑干白质纤维束 磁共振成像 扩散张量成像 DTI 

分 类 号：R445.2[医药卫生—影像医学与核医学] R322.81[医药卫生—诊断学]