材料和方法为了探讨实时灰阶超声断层显象(B型超声)对实验性动物肝癌的显示能力,我们应用我院传染病和流行病教研室以三甲基奶油黄(3＇-me-DAB)喂养了5～6个月、体重在150～250g的雄性大白鼠20只和来经致癌的正常大白鼠、体重亦在150～250g之间作为对照研究,以B型超声显象仪在该两批大白鼠体表进行直接探查,同时用A型超声诊断仪进行对比观察,在探查时详细记录大白鼠的肝脏最大径和超声图象, Materials and Methods To investigate the ability of real-time gray-scale ultrasound tomography (B-mode ultrasound) to display liver cancer in experimental animals, we used 3’-me-DAB in our Institute of Infectious Diseases and Epidemiology. Twenty male rats that were fed for 5 to 6 months, weighing 150-250 g, and normal carcinogenic mice, weighing 150-250 g, were used as controls for comparison with a B-mode ultrasound scanner. The rat’s body surface was directly probed, while the A-type ultrasonic diagnostic apparatus was used for comparative observation. During the exploration, the maximum liver diameter and ultrasound images of the rats were recorded.