图像退化是引起X射线探测器图像质量下降的主要原因。图像恢复,可以提高系统的分辨率和对比度灵敏度。通过对射线成像系统图像退化的分析,介绍了反滤波信号恢复方法,并提出了一种近似恢复算法,该算法将反滤波恢复近似为除法运算的恢复。给出了恢复前后的图像及标准差的对比,实验结果表明了该算法的有效性。 Image degradation is the main reason for the degradation of the X-ray detector image quality. Image recovery, can improve the system’s resolution and contrast sensitivity. By analyzing the image degradation of the ray imaging system, the method of signal recovery is introduced and an approximate restoration algorithm is proposed. The algorithm restores the inverse filter recovery to the recovery of the division operation. The comparison of the image and standard deviation before and after restoration is given, and the experimental results show the effectiveness of the algorithm.