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不同采样率对光声图像重建的影响

In Fluence of Different Sampling Rate on the Reconstruction of Photoacoustic Images

谭毅  
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摘要

为了实现高质量的快速光声图像重建, 研究了不同采样率对光声图像重建的影响。由实验表明, 对于mm量级与几百μm量级的吸收体, 将采样率分别调整到5~7 MHz和7~9 MHz时, 其成像质量好, 速度快。实验所用的光源为YAG激光器, 波长为1 064 nm, 重复频率为20 Hz, 脉宽为7 ns, 探测器为针状的PVDF膜水听器, 接收面积的直径为1 mm。

Abstract

In order to attain the reconstruction of photoacoustic images with high-contrast and fast noninvasive features, the effect from different sample rates was studied. The experimental results demonstrate that frequency of sample rate is about 5~7 MHz for the absorber with a few millimeter diameters, and it is 7~9 MHz for hundreds of μm diameter absorber. A Q-switched Nd: YAG laser, which operates at 1 064 nm, was used as light source. The laser has a 7 ns of pulse width and a 20 Hz of repetition frequency. A needle PVDF hydrophone with 1 mm diameter was used to detect photoacoustic signals.

Newport宣传-MKS新实验室计划
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中图分类号:Q334

基金项目:教育部基础研究资助项目(项目编号: 212177); 陕西省科技厅基础研究资助项目(项目编号: 2011JM1016)

收稿日期:2015-06-15

修改稿日期:2015-07-29

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谭毅:陕西理工学院物理与电信工程学院, 陕西 汉中 723003

联系人作者:谭毅(tanyi@snut.edu.cn)

备注:谭毅(1975-), 男, 湖南衡阳人, 副教授, 主要从事光声成像与应用光学仿真研究。

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引用该论文

Tan Yi. In Fluence of Different Sampling Rate on the Reconstruction of Photoacoustic Images[J]. APPLIED LASER, 2016, 36(1): 107-111

谭毅. 不同采样率对光声图像重建的影响[J]. 应用激光, 2016, 36(1): 107-111

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