摘要
按《医学影像物理学实验》教材给出的A型超声探测的纵向分辨力的测量方法 ,第二个界面的回波难以显示 ,因而给测量带来困难 .本文将水盘内两玻片在探头轴线位置上“一前一后”放置改为“相对探头轴线左右错开”放置 。
As presented in the textbook, it is difficult to determine the longitudinally resolving power by amplitude modulation. The second-echo can not display directly. The two slides in water plate are alternated respective to the axis, instead of at the same line. The measurement relults is direct-viewed and can be repeated very well.
出处
《物理实验》
北大核心
2004年第9期47-48,共2页
Physics Experimentation
