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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 value of MR perfusion imaging in the diagnosis of acute myocardial infarction. Methods Using 1.5T superconducting magnetic resonance scanner, 29 patients with clinically diagnosed acute myocardial infarction underwent perfusion imaging. Among them, 17 cases underwent coronary angiography. All patients were treated by AW4.0 workstation to calculate the first pass time And the first pass the maximum rate of rise, while measuring normal heart and ventricular cavity of the first passage of time and the maximum rate of rise. The total amount of contrast agent 20ml, the first injection flow rate 3ml / s, a total of 9ml, after 1ml / s injection. Results In 29 cases of myocardial infarction, the delay lesion was significantly enhanced and the maximal first rising slope was decreased. The first time delay was 28 cases, coronary angiography was performed in 17 cases, coronary stenosis was found in 14 cases, and coronary stenosis was not found in 3 cases. For subendocardial or epicardial infarction. Conclusion MR perfusion imaging of acute myocardial infarction has characteristic features.