Mate-rials and Meth ods:Eight cases of fresh pig hearts injected selectively diluted contrast med ium into every branch of coronary artery were scanned by MSCT. The pitch were1 and1.5,thickness were5mm,3.2mm,2.5mm,and0.6mm respectively.

• 材料与方法:8例新鲜猪心选择性注入对比剂后行MSCT扫描；螺距分别为1和1.；5；层厚分别为5mm；2