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目的：９９ｍＴｃ－ＮＯＥＴ再分布显像评价心活力的作用。材料和方法：６７例冠心病（ＣＡＤ）患者进行９９ｍＴｃ－ＮＯＥＴ运动及２ｈ再分布心肌灌注显像，其中１２例行４～６ｈ再分布显像，３例ＰＴＣＡ术后１个月静息显像。结果：９９ｍＴｃ－ＮＯＥＴ ２ｈ再分布显像示 ６８３％（８４／１２３）心肌节段有明显的再分布，其中７７．４％（６５／８４）心肌节段完全充填。４～６ｈ再分布显像示２ｈ时部分充填的心肌节段３７．５％（３／８）完全充填，无充填的４个节段仍无变化。 ＰＴＣＡ术后显像示术前所有异常的节段（６个有再分布和 １个无再分布节段）均大致上常。结论：９９ｍＴｃ－ＮＯＥＴ有明显的再分布特征，可用于心肌活力的研究，方法简便。
Objective: To evaluate the effect of 99mTc-NOET redistribution imaging on cardiac activity. MATERIALS AND METHODS: Sixty-seven patients with coronary artery disease (CAD) underwent 99mTc-NOET exercise and 2h redistribution myocardial perfusion imaging. Twelve of them were redistributed for 4 ~ 6h, and three patients showed resting imaging one month after PTCA . Results: 99mTc-NOET 2h redistribution imaging showed significant redistribution of myocardial segments in 683% (84/123), of which 77.4% (65/84) were completely filled in the myocardial segments. 4 ~ 6h redistribution imaging showed 2h partial filling of the myocardial segments 37.5% (3/8) fully filled, no filling of the four segments still no change. Postoperative PTCA showed all preoperative anomalous segments (6 with redistribution and 1 without redistribution segments) are generally on. Conclusion: 99mTc-NOET has obvious redistribution characteristics, which can be used to study myocardial viability. The method is simple and convenient.