Yang Di W, Xing Da, Yang Si H, Xiang Liang Z
Opt Express. 2007 Nov 12;15(23):15566-75. doi: 10.1364/oe.15.015566.
We present a fast full-view photoacoustic imaging system for visualizing tissue structures using a linear transducer array with combined scan. In this system, a 128-element linear transducer array was used to detect photoacoustic signals by combined scanning of electronic scan and mechanical scan. An improved limited-field filtered back projection algorithm with directivity factors was applied to reconstruct the optical absorption distribution. The experiments of phantoms and in vivo blood vessels in a rat brain were performed with this system. And a clear view of the curve boundaries of objects and the network of blood vessels of rat's brain were acquired. The experimental results demonstrate the multi-element photoacoustic imaging system has the ability of imaging complicated structures of objects.
我们展示了一种快速全视野光声成像系统，该系统使用具有组合扫描功能的线性换能器阵列来可视化组织结构。在该系统中，一个128阵元的线性换能器阵列通过电子扫描和机械扫描的组合扫描来检测光声信号。应用一种带有方向性因子的改进型有限视野滤波反投影算法来重建光吸收分布。使用该系统对模型以及大鼠脑部的体内血管进行了实验。并获得了物体曲线边界和大鼠脑血管网络的清晰图像。实验结果表明，多元光声成像系统具有对物体复杂结构进行成像的能力。
