磁共振灌注成像在急性心肌梗死诊断中的价值  

MR Perfusion Imaging in Acute Myocardial Infarction

作　　者：季文斌[1] 丁建荣[1] 唐礼江[2] 杜于茜[2] 吴海鸰[1] 樊树峰[1] 耿才正[1] 王冬女[1] 章士正 

机构地区：[1]浙江省台州医院放射科,浙江台州317000 [2]浙江省台州医院心内科,浙江台州317000 [3]浙江省邵逸夫医院放射科

出　　处：《实用放射学杂志》2007年第6期757-759,共3页Journal of Practical Radiology

摘　　要：目的研究磁共振灌注成像在急性心肌梗死诊断中的价值。方法使用1.5T超导型磁共振扫描仪,对29例经临床诊断的急性心肌梗死病人行灌注成像,其中17例进行冠状动脉造影术,全部病例通过AW4.0工作站处理,计算出首过时间及首过最大上升斜率,同时测定正常心肌与心室腔的首过时间及最大上升斜率。对比剂总量20ml,注射流率首过3ml/s,共9ml,以后以1ml/s注射。结果29例心肌梗死病例显示延迟病灶明显强化及首过最大上升斜率降低,28例首过时间延迟,17例行冠状动脉造影,14例发现冠状动脉狭窄,未发现冠状动脉狭窄的3例,均为心内膜下或心外膜下梗死。结论急性心肌梗死MR灌注成像具有特征性表现。Objective To study the diagnostic value of myocardial perfusion MR imaging in acute myocardial infarction. Methods 29 patients with acute myocardial infarction proved clinically underwent MR perfusion imaging with GE 1.5T unit. Of them, 17 cases underwent coronary angiography. Total 20 ml of contrast medium was administrated at 3 ml/s for first 9 ml, then at 1 ml/s for remains. The images were analyzed on GE AW4.0 workstation. The first phase time and maximal upsiope of myocardial enhancement were measured both normal and lesion cardiac muscle. Statistical significance was tested with paired - samples t test. Results Delayed enhancement and decreased maximal upsiope of the lesions were seen in all 29 cases. First pass time delayed in all but one. On coronary angiography 17cases,the narrow coronary arteries were showed in 14 cases and no coronary artery stenosis was found in other 3,these 3 cases were all endocardium or epicardium myocardial infarction. Conclusion Acute myocardial infarction is of specific findings on MR perfusion imaging .

关 键 词：心脏 心肌梗死 磁共振成像 灌注 

分 类 号：R542.2[医药卫生—心血管疾病] R445.2[医药卫生—内科学]