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在多数情况下,超声图象系统和多普勒血流测速仪组台仪比单一的超声多普勒仪有更多的临床优越性。但由于组合仪器之间存在相互干扰,独立的图象系统与多普勒血流测速仪不能同时工作。本文简要地回顾了解决此问题的一些不同方案,然后着重描述了一种分时工作方案。该方案在二维图象数据输入期间,停止多普勒的测量工作,而此期间丢失的测量信号由插入一同步信号来代替,该同步信号可由白噪声经过一离散时间FIR滤波器产生。其中滤波器参数由图象输入前所测得的一系列多普勒
In most cases, ultrasound imaging systems and Doppler flow velocity anemometers have more clinical advantages than a single ultrasound Doppler. However, independent imaging systems and Doppler flow anemometers can not work simultaneously due to the mutual interference between the combined instruments. This article briefly reviews some of the different scenarios for solving this problem, and then focuses on a time-sharing work scenario. This scheme stops the Doppler measurement during the input of two-dimensional image data, and the missing measurement signal during this period is replaced by the insertion of a synchronization signal which can be generated by white noise through a discrete-time FIR filter. The filter parameters were measured by a series of Doppler before image input