【摘要】 本文使用基于 TMS32 0 C2 5高速信号处理卡的双通道脉冲波经颅多普勒血流分析仪 ,建立起模拟血栓实验平台。从频域和时域两方面采集模拟血栓数据 ,并对血栓的特性及其检测方法进行研究。实验结果表明 ,从时域延迟和频谱特征变化两方面来检测血栓是一种有应用前景的方法。更多还原

【Abstract】 An experimental study on the characteristics of emboli by ultrasonic methods is presented in this paper. In order to acquire embolic signals, based on transcranial Doppler(TCD)blood flow analyzer, a two channel blood flow analyzer was set up. Programs of analog data collection both in frequency and time domains, spectrum analyzing, and system control are developed on the TMS320C25 high speed digital signal processing (DSP) board. Experimental results showed that it can be a good method to test emboli both from time domain delay and change of characteristics in frequency spectrum.更多还原