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为评价９９ｍＴｃ－甲氧基异丁基异腈（ＭＩＢＩ）平面门控心肌显像（ＥＧＰ）在心肌梗塞患者存活心肌判断中的准确性，对２１例心肌梗塞患者进行了静息ＥＧＰ、静息和运动９９ｍＴｃ－ＭＩＢＩ心肌单光子发射计算机断层（ＳＰＥＣＴ）显像及饥饿时静息１８Ｆ－脱氧葡萄糖（ＦＤＧ）正电于发射计算机断层（ＰＥＴ）显像．在２１例患者共１０５个心肌节段中，有１５个节段运动ＳＰＥＣＴ半定量分析局部９９ｍＴｃ－ＭＩＢＩ放射性分布大于左室峰计数的８０％（即正常节段），从本研究中排除．其余９０个节段中有７７个节段ＰＥＴ显像ＦＤＧ摄取明显，１３个节段无ＦＤＧ摄取．以ＦＤＧＰＥＴ为标准，ＥＧＰ在存活心肌判断中的灵敏度和特异性分别为９６％和７７％，而静息ＳＰＥＣＴ的灵敏度及特异性分别为９６％及６９％．两种显像方法在存活心肌判断中差异无显著性，同时两者在心肌节段间计分比较中有良好的一致性（ｒ＝０．８６）．提示ＥＧＰ在存活心肌判断中与ＭＩＢＩＳＰＥＣＴ相似．
To evaluate the accuracy of 99mTc-methoxyisobutylisonitrile (MIBI) planar gated myocardial imaging (EGP) in determining myocardial viability in patients with myocardial infarction, 21 patients with myocardial infarction underwent resting EGP, rest, and exercise 99mTc-MIBI myocardial single photon emission computed tomography (SPECT) imaging and starvation resting 18F-deoxyglucose (FDG) positron emission tomography (PET) imaging. Fifteen of the 21 patients with a total of 105 myocardial segments were excluded from this study by semi-quantitative SPECT semi-quantitative analysis of their 99m Tc-MIBI radioactivity profile greater than 80% of the LV peak count (normal segment). 77 of the remaining 90 segments showed significant FDG uptake in PET imaging and no FDG uptake in 13 segments. With FDGPET as the standard, the sensitivity and specificity of EGP in viable myocardium were 96% and 77%, respectively, whereas the sensitivity and specificity of resting SPECT were 96% and 69%, respectively. There was no significant difference between the two imaging methods in the determination of viable myocardium, and there was a good agreement between the two in the comparison of myocardial segments (r = 0.86). This suggests that EGP is similar to MIBISPECT in determining viable myocardium.