新边缘导向插值对CT成像质量的影响研究

Research on the effect of new edge-directed interpolation on CT image quality

将新边缘导向插值方法应用于CT图像重建的投影域,对投影数据进行恢复,并采用滤波反投影算法重建图像,以解决CT稀疏采样中投影数据的不完备而导致重建图像质量较差的问题.实验结果表明,与经典的双线性插值算法相比,基于新边缘导向插值方法得到的投影数据重建出的图像质量更高.

The new edge-directed interpolation method is applied to the projection domain of CT image reconstruction to recover the projection data,and the filter back projection algorithm is used to reconstruct the image,so as to solve the problem of poor reconstruction image quality caused by incomplete projection data in CT sparse sampling. Experimental results show that the reconstructed image quality based on the new edge-directed interpolation method is better compared with the traditional bilinear interpolation algorithm.