基于多通道并行采集的光声成像系统  

Photoacoustic Imaging System Based on Multi-Channel Parallel Acquisition

作　　者：许栋[1] 向良忠[1] 纪轩荣[1] 邢达(指导) 

机构地区：[1]华南师范大学生物光子学研究院激光生命科学研究所,激光生命科学教育部重点实验室,广东广州510631 [2]不详

出　　处：《中国激光》2011年第2期126-131,共6页Chinese Journal of Lasers

基　　金：国家973计划(2010CB732602);教育部长江学者与创新团队发展计划(IRT0829);国家自然科学基金(30627003,30870676);广东省自然科学基金(7117865);广东高校优秀青年创新人才培养计划(LYM09055)资助课题

摘　　要：设计了一套基于多通道并行采集的快速光声成像系统,包括超声探测器、多通道并行采集系统、短脉冲激光器、计算机组成的硬件平台,并开发了配套的上位机软件来控制系统的采集和实时成像。多通道并行采集系统包括前端模拟放大、抗混叠滤波、模数(A/D)转换、数据存储器、现场可编程门阵列(FPGA)控制和通用串行总线(USB)传输等部分,它实现了64路信号的全并行采集和数字化处理。模拟样品实验结果表明,采用多个位置的旋转扫描成像能够极大地提高图像的信噪比。因此,采用高重复频率的激光器作为激发源及多个探测器的全并行采集,有望发展成为一种实时的生物组织无损成像系统,为临床医学的无损伤检测提供了新的方法。A fast photoacoustic imaging system based on multi-channel parallel acquisition,which is composed of ultrasonic detector,multi-channel parallel acquisition system,short-pulse laser,computer hardware platform and a pack of software for the control of the data acquisition and real-time imaging,is designed.Multi-channel parallel acquisition system consists of front-end analog amplifier,anti-aliasing filter,A/D converter,data storage,field programmable gate array（FPGA） control and universal serial bus（USB） transfer and it has 64-channel full parallel acquisition and digital processing.The results of imitative sample show that multiple locations of rotating scan imaging improve the signal to noise ratio（SNR） greatly.Consequently,it is characterized by fast imaging and is expected to be a noninvasive real-time tissue imaging system with high repetition frequency laser as excitation and provide a new method for clinical noninvasive detection.

关 键 词：生物光学 光声成像系统 多通道并行采集 现场可编程门阵列 无损检测 

分 类 号：Q631[生物学—生物物理学]