X射线显微CT成像的图像实时校正研究

针对我们研制的小动物活体成像的X射线显微CT系统,研究了显微CT成像的图像实时校正问题,分别对探测器固有缺陷引起的像素响应失真及锥形成像几何造成的光照不均匀进行了分析,提出了校正方案,并实现了图像实时在线校正.初步的实验结果显示,该方案有很好的校正效果,取得了满意的成像质量,能满足实时性工作需求,可以推广应用于其它类似显微CT成像的图像实时校正.

Investigation of Online Image Distortion Corrections for X-ray Micro-CT Imaging

The aim of the study was to investigate the online image distortion corrections for our X-ray mi-cro-CT system for high-resolution small animal imaging. The distortions of micro-CT imaging due to the detectors intrinsic defects and the nonuniform irradiation of the cone-beam geometry were analyzed. The correction method for those image distortions was then developed and implemented with online image ac-quisition. The preliminary experiments show that our correction method is reliable and effective to correct those image distortions from the projection images. This image correction method could be utilized for ther similar micro-CT systems.