摘要
超声是频率高于 2 0 0 0 0Hz的声波 ,由于它遇到障碍物能发生反射、透射 ,同时具有方向性好、穿透能力强等特征 ,很快在医学诊断中得到重要应用 .本文着重阐述如何利用超声在人体各种组织内的传播特性不同而形成影像 。
The ultrasonic is sound wave which frequency is higher than 20000Hz. Because of its reflection and transmission when meeting obstacle, the characteristics of nice to directionality and strong to penetrability, the ultrasonic is used in medical diagnosis very soon. In this paper, the transmission characteristics which ultrasonic transmit in human body can form different images are mainly discussed. Depending on these images pathology can be diagnosed.
出处
《物理与工程》
2003年第2期41-45,共5页
Physics and Engineering
