| 超声多普勒血流物理模型的实现 |
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| 引用本文： | 吴海锋,许锋,张榆锋,施心陵. 超声多普勒血流物理模型的实现[J]. 云南大学学报(自然科学版), 2005, 27(1): 30-34 |
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| 作者姓名： | 吴海锋 许锋 张榆锋 施心陵 |
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| 作者单位： | 云南大学,电子工程系,云南,昆明,650091 |
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| 基金项目： | 云南省自然科学基金资助项目(2002Z0002C)，云南省创新人才项目(2002PY010). |
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| 摘 要： | 根据对超声多普勒血流物理模型的研究,提出了一套自己的物理模型,用超声探头采集出多普勒信号,然后再利用一些较为经典的方法,如短时傅立叶变换对其进行处理,然后得到其时频分布图.从这些分析结果中得到了一些有用的信息:一个脉动周期内的能量的分布是与液体流动的速度相关联的;一个脉动周期内的频偏也是与液体流动的速度相关联.
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| 关 键 词： | 超声多普勒血流信号 血流物理模型 短时傅立叶变换 |
| 文章编号： | 0258-7971(2005)01-0030-05 |
| 修稿时间： | 2004-06-28 |
The realization of the flow phantom |
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| WU Hai-feng,XU Feng,ZHANG Yu-feng,SHI Xin-ling. The realization of the flow phantom[J]. Journal of Yunnan University(Natural Sciences), 2005, 27(1): 30-34 |
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| Authors: | WU Hai-feng XU Feng ZHANG Yu-feng SHI Xin-ling |
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| Affiliation: | Department of Electronic Engineering, Yunnan University, Kunming 650091, China |
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| Abstract: | Based on the previous study on the flow phantom,the scheme of designing the flow phantom is introduced,which includes selecting the pump,molding the tissue-mimic,and making the blood-mimic.After putting this component together,the Doppler signal can be collected from this flow phantom by the ultrasound sensor.Then,its time-frequency figure can be obtained using the conventional algorithm,the STFT (Short Time Fourier Transform),to process it.From the calculating results based on the algorithms above,some useful information can be got:firstly,the power spectrum distribution is related to the flow speed in one pulsatile flow cycle;secondly,the frequency offset is also related to the flow speed. |
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| Keywords: | Doppler Ultrasonic blood flow signal flow phantom Short Time Fourier Transform |
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