The deformation information is obtained from ultrasonic echotime delay.
软组织的形变信息是通过超声回波延迟时间得到的。
2
The direction of longest echotime is the direction of minimum earth stress, and the direction of greatest earth stress is perpendicular to it.
回波时间最长的方向为最小地应力方向,最大地应力方向与之垂直。
3
He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.