| ChirP-z变换在超声多普勒血流声谱图中的应用 |
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| 引用本文： | 王一丁,高上凯. ChirP-z变换在超声多普勒血流声谱图中的应用[J]. 北京生物医学工程, 2001, 20(1): 11-13 |
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| 作者姓名： | 王一丁 高上凯 |
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| 作者单位： | 清华大学电机系生物医学工程研究所 |
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| 基金项目： | 国家自然科学基金;39770218; |
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| 摘 要： | 本文将Chirp-z变换方法用于超声多普勒血流信号的测量，利用该方法的局部频谱分析能力，有效实现了血流声谱图的局部放大。该方法可以在高采样频率条件下实现低流速 血流信号的局部可视化，同时由于局部范围内采样分辨率的提高，将获得更细致的血流声谱图，训测试该方法的有效性，将实测超声血流数据用该方法进行处理，成功地将低流速 血流信号进行了局部放大。
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| 关 键 词： | Chinp－z变换 超声多普勒血流声谱图 血流信号 测量 |
| 文章编号： | 1002-3208(2001)01-0011-03 |
| 修稿时间： | 1999-10-25 |
Application of Chirp-z Transform in Ultrasound Doppler Blood Flow Sonogram |
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| WANG Yiding,GAO Shangkai. Application of Chirp-z Transform in Ultrasound Doppler Blood Flow Sonogram[J]. Beijing Biomedical Engineering, 2001, 20(1): 11-13 |
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| Authors: | WANG Yiding GAO Shangkai |
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| Abstract: | It is introduced in this paper that the Chirp z transform was used for ultrasound Doppler blood flow sonogram. This method has the capability of regional spectral analysis, it can effectively zoom a part of Doppler blood flow sonogram. Even if the sampling rate is high, the method makes part of a low blood flow signal clearly visible in frequency domain, and more detailed blood flow sonogram can be obtained. Real blood flow data was processed by using chirp z transform. Parts of the low blood flow signal can be amplified. The results correspond with theoretical analysis. |
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| Keywords: | Ultrasound Blood flow Doppler sonogram |
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