数字射线成像中射线对面阵CCD图像传感器影响的研究

Influences of X-ray to Area CCD Image Sensors in Digital Radiographn

目的 研究数字射线成像系统中 X射线对 CCD图像传感器及其系统成像质量的影响方式、特点以及图像质量的改善算法 .方法 利用实验手段 ,对 CCD图像传感器区域上的受摄像影响的像素数进行了统计 ,并对统计的结果进行了分析 .结果与结论 在 DR系统中 ,x射线对 CCD产生的影响直接造成了图像上的单像素、高幅值的尖峰脉冲 ,针对这种噪声特点 。

Aim\ To study the mode and characteristic of effect of x -Ray to area CCD image sensor in DR inspection system and to present an algorit hm to improve the image quality. Methods\ By experiments the statistics on the humbers of CCD senso r pixels effected by x-ray is analyzed. Results and Conclusion\ In digital radiography inspection systems, those x-ray particles hitting on the CCD sensor cause directly many inspulesiv ey-noise points with high gray level in the image. Two filtering algorithms fo r reducingthis noise are proposed.