The normal sonar system rotates its beam, either continuously or under the operator's control, and the position of maximum response to a particular echo is taken as the bearing of the target.
The chirping frequency of the pulsed echo from human tissue under normal condition is formulated. It will be helpful for the design of a chirping receiver.
本文专为迁频接收机的设计推导了在常态条件下人体中脉冲回声的频率迁移量的公式。
3
Objective: To evaluate the diffusion weighted echo planar imaging (DW EPI) features of brain in normal subjects and in patients with cerebral infarction.