基于环形光源的3D光声层析成像  

3D Photoacoustic Tomography Based on Ring Light Source

作　　者：谭毅[1] 李长辉[2] 唐洁[1] 何军锋[1] Tan Yi;Li Changhui;Tang Jie;He Junfeng(School of Physics and Telecommunication Engineering,Shaanci University of Technology,Hanzhong,Shaanxi72300l,China;Department of Biomedical Engineering,College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]陕西理工大学物理与电信工程学院,陕西汉中723001 [2]北京大学工学院生物医学工程系,北京100871

出　　处：《应用激光》2022年第11期99-103,共5页Applied Laser

基　　金：陕西省自然科学基金面上项目(2021JM-4840)。

摘　　要：为了更有效地实现3D光声层析成像,利用聚焦超声换能器探测环形光源激发的光声信号,采用滤波反投影算法进行光声图像重建,最后使用Volview软件对不同断层的重建图像进行3D组建,得到了模拟血管和碳棒的3D图像。仿真和实验结果表明,通过该方法构建的3D图像分辨率高、对比度好,图像与实物十分吻合。实验所用的光源为YAG激光器,波长为780 nm,重复频率为10 Hz,脉宽为16 ns,探测器为圆柱形凹面聚焦超声换能器,接收面积的直径为3 cm。In order to get better 3 D photoacoustic tomography,focused ultrasound transducer is used to detect the photoacoustic signal of ring source excitation,then the filtered back projection algorithm,finally the 3 D photoacoustic tomography of simulated blood vessel and carbon was formed by Volview software.The simulation and experimental results show that the image comes in true with high resolution and good contrast using the method,and the reconstructed images are in good agreement with the real objects in the 3 D image.The YAG laser source has a wavelength of 780 nm,repetition frequency of 10 Hz,pulse width of 16 ns,the PA signal detector is a cylindrical focused ultrasonic transducer,with a receiving diameter of 3 cm.

关 键 词：医用光学与生物技术 3D光声层析成像 环形光源 光声信号 

分 类 号：Q334[生物学—遗传学]