为了更形象直观的反映病变组织的位置、大小和形状, 利用高灵敏、大角度接收的多元线性阵列探测器接收光声信号, 并将多元线性阵列探测器进行平面扫描, 得到光声信号的三维数据, 再采用滤波反投影算法将探测到的三维数据直接在整个3D空间进行反投影重建, 得到了模拟血管、铅笔芯和鸡肝的3D重建图像。由实验结果表明, 通过该方法和系统构建的3D图像分辨率较高, 对比度较好, 其x、y、z方向的分辨率分别为0.67、0.34和1 mm。该装置和成像方法将为以后临床病变组织的3D光声成像检测提供一定的技术支持。

To detect the location, size, and shape of the lesion, using a multi-linear array detector to capture the photoacoustic signal with a high sensitivity and a large receiving angle, and the photoacoustic signals 3D data could be obtained by plane scanning the multi-linear array detector. A series of 3D reconstruction images of the simulated blood vessel, pencil core, and chicken liver were obtained by using a filtered back-projection algorithm to reconstruct the detected 3D data directly in the whole 3D space. The experimental results show that the 3D image constructed by the method and the system has high resolution and good contrast, and the resolution in the x, y and z direction are 0.67, 0.34 and 1 mm, respectively. The device and imaging method will provide technical support for 3D photoacoustic imaging of clinical pathological tissue in the future.