|
|||||
|
|
| 小波尺度图分析法及其在超声血流多普勒信号中的应用 | |
| 引用本文： | 张平,刘颖,刘志言,沈毅,于建宏.小波尺度图分析法及其在超声血流多普勒信号中的应用[J].航天医学与医学工程,2000,13(2):119-123. |
| 作者姓名： | 张平 刘颖 刘志言 沈毅 于建宏 |
| 作者单位： | 1. 中国航天科技集团公司704所,北京,100076 2. 哈尔滨市第一医院内分泌科,哈尔滨,150010 3. 哈尔滨工业大学控制工程系,哈尔滨,150001 4. 中国人民解放军211医院,哈尔滨,150000 |
| 摘 要： | 目的 将现代小波尺度图分析方法应用到人体血流多普勒信号的谱估计之中,计算血流多为勒信号的功率谱,得到小波意义上的尺度图。方法 从时频分布的观点,小波尺度图是一种仿射平滑的Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布,具有恒“Ｑ”特性的时间频率分析窗,对于人体颈总动脉的仿真多普勒血流信号,进行了小波尺度图的研究。结果 通过血流多普勒信号的小波尺度图研究,发现利用小波尺度图可心提高血流多普勒信号低步 段的频谱分辨率, |
| 关 键 词： | 小波变换 多普勒信号 血流 频谱分析 |
| 修稿时间： | 1999-07-28 |
Analysis of Wavelet Scalogram of Blood Flow Ultrasonic Doppler Signal |
|
| ZHANG Ping,LIU Ying,LIU Zhi-yan,SHEN Yi,YU Jian-hong.Analysis of Wavelet Scalogram of Blood Flow Ultrasonic Doppler Signal[J].Space Medicine & Medical Engineering,2000,13(2):119-123. | |
| Authors: | ZHANG Ping LIU Ying LIU Zhi-yan SHEN Yi YU Jian-hong |
| Institution: | Research Institute of Telemetry Aerial Tec. co., Beijing, China. |
| Abstract: | Objective: To study the power spectrum density of blood flow ultrasonic Doppler signal using wavelet analysis. Method: Doppler signal of blood flow in human common carotid artery was studied with wavelet scalogram analysis, an affine smoothing Wigner-Ville transform with a constant "Q" character. Result: Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram. Conclusion: It is practicable to estimate the spectrum of Doppler signals of blood flow by the wavelet analysis method. And this can be used in low speed blood flow for higher resolution of spectrum in the low frequency portion. |
| Keywords: | wavelet transform fourier transform doppler signal blood flow spectrum analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |