基于虚拟仪器的光声信号采集和成像系统

Photoacoustic signal collecting and image reconstructing system based on virtual instruments

为了实现光声信号的快速采集和图像重建,采用基于虚拟仪器的光声信号采集和成像系统进行光声信号采集,由LABVIEW调用MATLAB程序对采集到的数据进行处理,最后利用滤波反投影重建算法,实现了对模拟组织样品的光声层析成像。成像系统的分辨率为0.15mm,重建图像与实物十分吻合。结果表明,该系统具有快速、方便、直观等特点,有望发展成为一种低成本的实用的临床诊断仪器。

In order to collect photoacoustic signals and reconstruct images quickly,photoacoustic signal collecting and image reconstructing system based on virtual instrument is applied to collect photoacoustic signals. Then the program of MATLAB is used to process collected data by LABVIEW. The photoaeoustic imaging of phantom is obtained with filtered back projection algorithm in the end. The resolution of reconstructed image is 0.15mm. The reconstructed image is corresponded well with phantom. The methodology and equipment show that this imaging system features high speed and convenience, Furthermore, it is likely to be developed into a cheaper and practical clinical diagnosis instrument.