基于多元线性阵列探测器的快速光声层析成像  

Fast Photoacoustic Imaging Based on Multi-Element Linear Transducer Array

作　　者：尹邦政[1] 邢达[1] 王毅[1] 曾亚光[1] 谭毅[1] 

机构地区：[1]华南师范大学激光生命科学研究所,广州510631

出　　处：《光学学报》2005年第3期331-334,共4页Acta Optica Sinica

基　　金：国家自然科学基金面上项目(60378043);国家重大基础研究前基专项(2002CCC00400);广东省自然科学基金团队项目(015012)资助课题

摘　　要：报道了一种基于相控聚焦的多元线性阵列探测器进行快速光声层析成像的方法和装置,并实现了模拟组织的光声层析成像。实验中采用波长为532 nm脉宽为7 ns的倍频Q YAG激光器作为激发光源。多元线性阵列探测器由320个振元组成,采用相控聚焦的方法成像,每次由11 个振群的探测器接受信号并合并1 路,一幅图像由64路这样的信号组成。实验结果能够正确反映样品中的光学吸收分布。与现有的方法比较,本系统具有快速方便的特点,它有望成为一种组织功能在体成像的新方法,发展成为一种低成本的实用的临床诊断装置。A fast photoacoustic (PA) imaging system based on multi-element linear transducer array and phase-controlled focus method was developed and tested on phantoms. A Q-switched Nd:YAG laser operating at 532 nm and pulse width of 7 ns was used in our experiment as thermal source. The multi-element linear transducer array consists of 320 elements. By phase-controlled focus method, 64 signals, one of which gathered by 11-group element, make up an image. Phantom experimental results can reflect the distribution of the optical absorption correctly. Compared to other existing technology and algorithm, the PA imaging based on transducer array was characterized with speediness and convenience. It can provide a new approach for tissue functional imaging at vivo, and may have potentials in developing an appliance for clinic diagnosis.

关 键 词：成像系统 光声成像 线性阵列探测器 相控聚焦 

分 类 号：Q433[生物学—生理学]