Methods:Twelve dogs were performed with intravenous infusion of perfluorocarbon gas(C 3F 8)contrast agent by using Doppler tissue energy imaging(DTE),second harmonic imaging (SHI),and intermittent ultrasound imaging(IUI).

• 方法 :应用多普勒组织能量成像、二次谐波成像、间歇式超声成像技术对 12只犬进行静脉心肌造影 ,造影剂为自制氟碳(C3F8)造影剂。