目的　评价 99m Tc- MIBI门控心肌灌注断层显像估价冠心病 (CAD)的准确性 ,以及门控心肌灌注断层显像显示心肌损害与冠脉造影的关系。方法　对 93例受检者进行了运动 /静息 99m Tc- MIBI门控心肌灌注断层显像 ,其中 47例有冠脉造影检查 ,冠状动脉狭窄 >50 %为 CAD诊断标准。结果　检测 CAD的灵敏度为 84.84% ,特异性为 85.71 % ,准确性为 92 .0 0 %。正常人组的正常符合率 94%。检测 LAD病变的灵敏度为84.62 % ,LCX为 77.77% ,RCA为 85.71 %。检测 L AD病变的准确性 79% ,LCX为 77% ,RCA为 82 %。 1 2例冠脉造影显示 50 %～ 70 %狭窄者与心肌灌注显像的相关性较差 (r=0 .33,P=NS)。 2 1例冠脉造影显示 >70 %狭窄者与心肌灌注显像有良好的相关性 (r=0 .0 5,P<0 .0 5)。结论　 99m Tc-MIBI门控心肌灌注断层显像可以准确地检测冠心病 ,在避免冠脉造影检查风险方面 ,对老年病人更有实际应用价值 Objective To evaluate the accuracy of 99m Tc-MIBI gated myocardial perfusion imaging in the assessment of coronary heart disease (CAD) and the relationship between myocardial damage and coronary angiography by gated myocardial perfusion tomography. Methods Ninety-three subjects underwent 99m Tc-MIBI gated myocardial perfusion imaging, of which 47 had coronary angiography and> 50% had coronary artery stenosis as CAD criteria. Results The sensitivity of detecting CAD was 84.84%, the specificity was 85.71% and the accuracy was 92.0%. The normal rate of normal group 94%. Sensitivity of detection of LAD lesions was 84.62%, LCX was 77.77%, RCA was 85.71%. The accuracy of detecting LAD lesions was 79%, LCX was 77% and RCA was 82%. Coronary angiography showed a poor correlation between myocardial perfusion imaging in 50% and 70% of stenoses (r = .33, P = NS). 2 1 coronary angiography showed> 70% stenosis and myocardial perfusion imaging had a good correlation (r = 0. 05, P <0. 05). Conclusion 99m Tc-MIBI gated myocardial perfusion tomography can accurately detect coronary heart disease, in order to avoid the risk of coronary angiography, more practical value for elderly patients