插值方法在光声图像重建中的应用

Application of Interpolation Method in Photoacoustic Image Reconstruction

在光声图像重建的滤波反投影算法中,需要对待测样品进行全方位扫描以获取光声信号数据。但在实际应用当中,超声传感器的采集位置数目和采样角度会受到硬件条件及空间位置的限制,从而造成了重建图像质量的下降。针对上述问题,提出了利用插值方法对光声信号数据进行预处理的解决方案。使用Matlab软件进行了数值仿真,结果表明,通过对插值之后的数据进行重建,图像峰值信噪比得到了明显的提高。

Photoacoustic image reconstruction with filtered back projection algorithm needs to obtain the full-scanned photoacoustic data of the sample. In the practical application, the number of collecting locations and the sampling angle of the ultrasonic sensor will be subiect to the restrictions of the hardware conditions and spatial location, resulting in a decline in the quality of the reconstructed image. In response to these problems, proposed an interpolation method to preprocess the photoacoustic data. The results from the numerical simulation of Mat- lab demonstrate that the image peak signal-to-noise ratio（PSNR） has been significantly improved.