公开(公告)号：EP0212090A1

公开(公告)日：1987-03-04

申请号：EP86107241.1

申请日：1986-05-28

Applicant: Advanced Technology Laboratories, Inc.

Inventor： DesJardins, Philip A. ,  Powers, Jeffry E.

IPC: A61B8/06

CPC classification number: A61B8/06

Abstract: A Doppler blood velocity measuring device is described which includes anti-aliasing circuitry. The anti-aliasing circuitry is based upon the use of a multigate Doppler unit (12) which receives Doppler shift frequency information from various depth ranges. Thereafter, the Doppler frequencies received are corrected by adding a correction frequency to the perceived Doppler frequency with the correction frequency selected based on the assumption that blood flow velocity cannot change drastically between adjacent depths.

Abstract translation: 描述了包括抗混叠电路的多普勒血流速度测量装置。 抗混叠电路基于使用从多个深度范围接收多普勒频移信息的多普勒多普勒单元（12）。 此后，通过将校正频率与基于假定血流速度在相邻深度之间不能显着变化的选择的校正频率相加来校正所接收的多普勒频率。