| 利用改进的百分比法提取多普勒血流声谱图包络 |
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| 引用本文： | 刘斌,汪源源,王威琪.利用改进的百分比法提取多普勒血流声谱图包络[J].声学技术,1998,17(1):9-11,14. |
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| 作者姓名： | 刘斌 汪源源 王威琪 |
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| 作者单位： | 复旦大学电子工程系 |
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| 摘 要： | 本文从是了大频率的数字估计方法着手，提取声谱图的包络。
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| 关 键 词： | 声谱图包络 百分比法 超声多普勒信号 超声诊断 |
| 收稿时间： | 1997/2/21 0:00:00 |
Extracting the sonogram envelop using the improved percentile method |
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| LIU Bin,WANG Yuanyuan and WANG Weiqi.Extracting the sonogram envelop using the improved percentile method[J].Technical Acoustics,1998,17(1):9-11,14. |
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| Authors: | LIU Bin WANG Yuanyuan and WANG Weiqi |
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| Affiliation: | Dept. E. E., Fudan University, Shanghai 200433;Dept. E. E., Fudan University, Shanghai 200433;Dept. E. E., Fudan University, Shanghai 200433 |
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| Abstract: | In this paper, the extraction of sonogram envelop by estimation of the maximum frequency is discussed. After analyzing the shortcomings of the former four digital estimation algorithms of maximum frcqucncy,an improved percentile method is put forward,which uses the total signal plus noise power as a threshold to choose different ways to estimate maximum frequency under different phases of a cardiac cycle,and gains quite well results of about 20 clinical cases. |
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| Keywords: | sonogram envelop signal noise power percentile method |
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