| 超声多普勒方向性血流信息的提取 |
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| 引用本文： | 高上凯,邵会华,沈以鸿,杨福生.超声多普勒方向性血流信息的提取[J].清华大学学报(自然科学版),1984(2). |
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| 作者姓名： | 高上凯 邵会华 沈以鸿 杨福生 |
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| 作者单位： | 近代生物学及生物医学工程研究所
(高上凯，邵会华，沈以鸿)，近代生物学及生物医学工程研究所(杨福生) |
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| 摘 要： | 本文以窄带随机信号理论为基础，对方向性血流信息提取的原理作了有别于文献报导的分析，并指出了时城后处理方法在提取方向信息中存在的问题。此外，本文还就在前置放大器中使用丙类放大器对谱分析结果所造成的失真作了分析。在上述理论分析的基础上介绍了新试制的方向性多普勒血流计原理框图。
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| 关 键 词： | 超声 多普勒 血流仪 随机信号 |
The Extraction of Directional Ultrasonic Doppler Blood Flow Signals |
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| Gao Shanghai,Shao Huihua,Shen Yihong,Yang Fusheng.The Extraction of Directional Ultrasonic Doppler Blood Flow Signals[J].Journal of Tsinghua University(Science and Technology),1984(2). |
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| Authors: | Gao Shanghai Shao Huihua Shen Yihong Yang Fusheng |
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| Institution: | Institute of Modern Biology and Biomedical Engineering |
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| Abstract: | The method of extracting the directional Doppler blood flow signals is des- cribed. It is based on the theory of narrow band random signals and differs from those presented in the literature available. The inadequacy Of the so- called "time domain post-processing" for directional information extraction is pointed out. The distortion of the spectral density function caused by using class C amplifieation in pre-amplifier are analysed. Based on the analysis, the block diagram of a flew directional Doppler blood flow meter is introduced. |
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| Keywords: | ultrasonics Doppler blood flow meter random signal |
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