3.0T磁敏感加权成像在脊髓出血性病变中的应用价值  

The value of 3.0T susceptibility weighted imaging(SWI) in detection of spinal hemorrhagic lesion

作　　者：刘昌盛[1] 査云飞[1] 李茂进[1] 谢宝君[1] 邱丽[1] 李远锋[1] 杨仁杰[1] 黄冬杰[1] 

机构地区：[1]武汉大学人民医院放射科,430060

出　　处：《放射学实践》2012年第8期832-835,共4页Radiologic Practice

摘　　要：目的:探讨磁敏感加权成像在脊髓出血性病变中的应用价值。方法:32例脊髓出血性病变患者(病变组)和16例健康志愿者(对照组)行3.0T磁敏感加权成像(SWI)、二维扰相梯度回波T2*加权(2D-MERGE T2*WI)、FSE T1WI及FSE T2WI扫描。32例病例均经临床随访及病理证实,包括脊髓挫裂伤20例、脊髓动静脉畸形6例、脊髓海绵状血管瘤2例、脊髓星形细胞瘤伴出血4例。比较分析SWI及2D-MERGE T2*WI、常规FSE T2WI对脊髓出血性病变检出的敏感度和特异度。结果:20例脊髓挫裂伤患者常规FSE T2WI均显示水肿征象,其中4例脊髓挫裂伤在SWI、2D-MERGET2*WI、常规FSE T1WI及FSE T2WI均未见出血征象,8例脊髓挫裂伤仅在SWI显示出血征象,另外8例脊髓挫裂伤、6例脊髓动静脉畸形、2例脊髓海绵状血管瘤和4例脊髓星形细胞瘤伴出血在SWI显示低信号出血征象较2D-MERGET2*WI及常规FSE T2WI更敏感。结论:3.0T磁敏感加权成像检出脊髓出血性病变比常规MRI更敏感,可作为脊髓出血性病变MRI检查重要的补充序列。Objective：To assess the value of 3.0T susceptibility weighted imaging （SWI） in detecting spinal hemor- rhagic lesion. Methods：Thirty-two patients with spinal injury （n：20）,arteriovenous malformation （n： 6）, cavernous he- mangioma （n= 2） and a strocytoma （n=4） and 16 healthy volunteers as a control group underwent SWI, 2D-MERGE T2 ＊ WI,FSE T1 WI and FSE T2 WI on a 3.0T scanner. The sensitivity and specificity of 3T MRI for spinal hemorrhagic lesion detection were calculated. Results： Among 32 patients with spinal hemorrhagic lesion, 20 patients with spinal contusion showed edema on FSE T2 WI,4 patients showed no sign of hemorrhagic lesion on SWI, 2D-MERGE T2 ＊ WI, FSE T1 WI and FSE T2 WI. 8 patients with spinal contusion showed hemorrhagic lesion on SWI, but not on 2D-MERGE T2 ＊ WI and FSE T2 WI. Moreover,in 6 patients with arteriovenous malformation, 2 patients with cavernous hemangioma and 4 patients with astrocytoma,hemorrhagic lesion showed much lower signal intensity on SWI compared to 2D-MERGE T2 ＊ WI and FSE T2 WI. Conclusion：SWI is more sensitive than conventional MRI methods in detecting spinal hemorrhagic lesion. It may become a supplementary method in the routine evaluation of spinal hemorrhagic diseases.

关 键 词：磁敏感加权成像 磁共振成像 脊髓 出血 

分 类 号：R445.2[医药卫生—影像医学与核医学] R744[医药卫生—诊断学]