低场磁共振FLAIR序列对脑部疾病的诊断价值  

Diagnostic accuracy of FLAIR imaging at low field strength for the cerebral lesions

作　　者：杜国忠[1] 王艳玲[1] 张水平[1] 

机构地区：[1]江苏省扬中市人民医院影像科,江苏扬中212200

出　　处：《实用医学影像杂志》2008年第4期208-210,共3页Journal of Practical Medical Imaging

摘　　要：目的探讨低场磁共振FLAIR序列对脑部病变的诊断准确性,并与常规T2WI序列比较。方法120例经手术病理或临床证实的脑部病变患者均经低场磁共振FLAIR序列与常规T2WI序列检查,对获自两种技术的病灶检出率及病灶内部结构与边缘的显示程度进行了比较。结果在120例的262个脑部病变中,FLAIR序列的检出率为98.5%(258/262),而常规T2WI序列为82.4%(216/262);FLAIR序列良好显示病灶内部结构与边缘比例为66.3%(171/258),而常规T2WI序列仅为13.4%(29/216),二者有显著性差异(P<0.01)。结论在低场MRI中,FLAIR序列显示脑皮层、皮层下和脑室旁病灶的敏感性明显高于常规T2WI序列,且能获得更多的病理信息。Objective To investigate the diagnostic accuracy of fluid attenuated inversion recovery（FLAIR） sequence at low field strength for the cerebral lesions and to compare with that of conventional T2-weighted imaging （T2WI） sequence. Methods A hundred and twenty patients with surgically, pathologically or clinically proved cerebral lesions underwent beth examinations of FLAIR imaging and conventional T2WI. The accurate degrees of above two technic sequences in showing the internal structures and borders of the lesions were compared each other. Results Among 262 cerebral lesions of 120 patients, the detecting rate of FLAIR sequence was 98.5 %（258/ 262）,while that of conventional T2WI sequence was 82.4%（216/264）.The ratio of FLAIR sequence in good showing the internal structures and borders of the lesions was 66.3%（171/258）,while that of conventional T2WI sequence was only 13.4%（29/216）.There was a significant difference （P 〈0.01） between the beth techniques. Conclusion During low field strength MR imaging ,the sensitivity of FLAIR sequence in showing the cortical-, subcortical-and periventricular lesions is obviously higher than that of conventional T2WI sequence, and can provide more informations of histopatholopgy.

关 键 词：脑部病变 磁共振成像 液体衰减反转恢复序列 T2加权成像序列 

分 类 号：R445.2[医药卫生—影像医学与核医学] R742[医药卫生—诊断学]