BLADE技术消除磁共振成像运动伪影的临床应用  

Clinical Application of BLADE Technique in Correcting Motion Artifacts of MRI

作　　者：宋云龙[1] 张挽时[1] 王忠[2] 祝红线[1] 方红[1] 毕永民[1] 

机构地区：[1]空军总医院CT&MRI科,北京100036 [2]西门子(中国)公司磁共振事业部,北京100102

出　　处：《放射学实践》2007年第11期1228-1231,共4页Radiologic Practice

摘　　要：目的:探讨刀锋伪影校正(BLADE)技术在消除MRI运动伪影方面的临床应用价值。方法:177例(头部74例、脊柱68例、腹部35例)常规MRI检查出现运动伪影的患者,改行BLADE技术MRI扫描,对比常规序列扫描来评价BLADE技术对运动伪影消除的作用。以显示内囊结构、脑脊液、肝中静脉或下腔静脉的清晰程度,将图像质量分为4级。结果:177例中,行常规MRI扫描,图像质量为Ⅱ级以上影响诊断的病例共92例(52%),其中头部39例、脊柱29例、腹部24例。采用BLADE技术扫描后,Ⅱ级以上影响诊断的病例共20例(11.3%),两者比较差异有极显著性意义(χ2=7.12,P<0.01)。结论:BLADE技术对消除常规MRI扫描出现的运动伪影有显著作用,可广泛应用于头部、脊柱、腹部等部位常规MRI时运动伪影的校正,尤其适用于小儿或不配合患者,可提供更清晰的MRI图像。Objective：To comparatively evaluate the clinical effect of BLADE technique on correcting MRI motion artifacts with that with MR regular pulse sequences. Methods： 177 cases of patients （including 74 cases of head,68 cases of spine and 35 cases of abdomen scans） in which motion artifacts were found with routine MR sequences were rescanned with BLADE technique. The effect of BLADE technique on correcting the motion artifacts made with routine imaging sequences were comparatively evaluated. The evaluation criteria were designated as 4 grades （grade 0 to grade Ⅲ ） on the bases of the conspicuity of displaying the internal capsule, cerebrospinal fluid, middle hepatic vein and inferior vena cava. Results： 92 of the 177 cases （52.0%） scanned with regular imaging sequences were classified as grade Ⅱ or over,including 39 head,29 spine and 24 abdomen scans;in these cases, the motion artifacts affected the image quality for diagnosis. Comparatively,only 20 of the 177 rescanned cases （11.3%） were evaluated as grade II or over,including 6 head,8 spine and 6 abdomen scans, in which BLADE technique was used and the motion artifacts still affected image quality for diagnosis. The difference of potentials in correcting motion artifacts between BLADE and regular imaging techniques was remarkably significant （P〈 0. 01 ）. Conclusion：BLADE technique played an important role in correcting motion artifacts in MRI scanning and was highly recommended for correcting MR motion artifacts in head, spine and abdomen scans, especially for the examinations in children and uncooperative patients.

关 键 词：磁共振成像 伪影 图像质量 

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]