电子束CT犬实验性梗塞心肌的三维重建与病理对照

用电子束ＣＴ重建能表示梗塞部位及形态的心脏三维图象，通过结扎犬心冠状动脉左旋支及其分支，形成左室侧壁梗塞区，经电子束ＣＴ增强容积扫描方式得到犬心断面。利用区域扩充法对梗塞心肌进行自动分割，采用表面重建法完成犬心的三维重建，用硝基四唑对病理切片进行染色，结果：清晰显示出了犬心的三维图象，并在三维图象上精确表示出了梗塞的部位及形态。结论：在造影剂注射量与扫描起始时间适宜的条件下，利用电子束ＣＴ可以诊断梗塞的部位与大小，且能重建出反应病变情况的心脏三维图象

3-DIMENSIOANAL COMPUTERIZED RECONSTRUCTION OF MYOCARDIAL ISCHEMIA FROM ELECTRON BEAM CT

We reconstructed a 3 dimensioanal image of heart and the area of myocardial ischemia from 2 dimensioanal tomogram of electron beam CT (EBCT). The left circumflex branch of coronary artery were occluded to form ischemia of left ventricular lateral wall in six dogs. A series of heart section were obtained by using the enhanced volume scanning of EBCT. The ischemic myocardium was recognized in program in terms of area expanding method. Surface reconstruction was applied to constitute 3 dimensioanal image of whole heart. Pathological section was stained with Nitro BT. RESULTS:The reconstructed 3 dimensioanal image of heart was realistically displayed. The position and configuration of ischemic region was identified accurately and quantitatively. CONCLUSION:Position and volume of infarction can be diagnose by using EBCT. The 3 dimensioanal reconstruction of myocardial ischemia could help physician to diagnose the focus of myocardial infarction more precisely than 2 dimensioanal image of EBCT.