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为了解核素心肌显像在定位及判断冠状动脉（冠脉）异常部位及程度中的作用，对３４例心肌梗塞患者在１个月内分别进行了９９ｍ锝－ＭＩＢＩ（ＭＢ）静息定量心肌显像及冠脉造影检查。结果表明：当心肌区段的ＭＢ摄取值小于左室峰计数区段的５０％时，８８％的可能性为狭窄大于９０％的冠脉所支配，而局部ＭＢ摄取在正常范围时，８２％为狭窄小于５０％的冠脉所支配；在阻塞冠脉支配区，有侧支循环存在的心肌区段ＭＢ摄取值明显高于无侧支供血的心肌；ＭＢ静息定量心肌显像对明确异常的冠脉（狭窄＞５０％）检测灵敏性为８７％，特异性为９０％。提示：ＭＢ定量心肌显像能较好地鉴别严重狭窄或阻塞冠脉支配区心肌，并有效判断局部侧支循环及存活心肌的可能性
To understand the role of radionuclide myocardial imaging in determining and determining the location and extent of abnormal coronary arteries (coronary arteries), 34 patients with myocardial infarction were subjected to 99m Tc-MIBI (MB) resting quantification within 1 month Imaging and coronary angiography. The results showed that when MB in myocardial segment was less than 50% of the left ventricular peak count segment, the probability of 88% was dominated by coronary artery with stenosis> 90%. While local MB uptake was in the normal range, 82% Which is dominated by the coronary artery whose stenosis is less than 50%. In the obstructed coronary artery area, the MB value in the myocardium with collateral circulation is significantly higher than that in the myocardium without collateral blood supply. The MB abnormal myocardial perfusion imaging The sensitivity of the coronary artery (stenosis> 50%) was 87% with a specificity of 90%. Tip: MB quantitative myocardial imaging can better identify severe stenosis or occlusion of coronary artery territory, and effectively determine the possibility of local collateral circulation and myocardial viability