目的：比较２０１Ｔ１再注射显象、再注射后２０ｈ延迟显象、ＮＴＧ显象和ＧＩＫ显象四种心肌灌注断层显象方案，在存活心肌判定中的差别。材料和方法：２５例ＭＩ患者均行上述四种显象方案，其中１２例于ＰＴＣＡ术后、６例于ＣＡＢＧ术后复查了静态心肌断层显象。采用圆周剖面法进行定量分析，以存活分数作为心肌有无活性的判断指标。结果：四种显象方案对存活心肌的检出率分别为３５５％，３７１％，３８６％和４１７％，四种显象方案之间无显著性差异，并具有良好的相关性。与１８例ＰＴＣＡ或ＣＡＢＧ患者术后显象比较，四种显象方案检测存活心肌的阳性符合率分别为７９２％，８１３％，８５４％和９１７％。结论：在对ＭＩ患者存活心肌的检出率上，四种显象方案之间没有显著性差异，并具有良好的相关性 OBJECTIVE: To compare the difference in survival myocardial perfusion imaging between 201T1 re-injection imaging, 20h post-injection delaying imaging, NTG imaging and GIK imaging. MATERIALS AND METHODS: Twenty-five MI patients underwent the above four imaging modalities, 12 of whom underwent PTCA and 6 after CABG. Circumferential cross-sectional method for quantitative analysis, survival score as a marker of myocardial activity. Results: The detection rates of viable myocardium were 355%, 371%, 386% and 417% in four imaging modalities respectively. There was no significant difference between the four imaging modalities Good correlation. Compared with postoperative imaging in 18 patients with PTCA or CABG, the positive coincidence rates of viable myocardium in the four imaging modalities were 792%, 813%, 854% and 917%, respectively. CONCLUSIONS: There is no significant difference between the four imaging regimens in the detection rate of viable myocardium in patients with MI, and has a good correlation