摘要
X射线相位衬度CT指的是在通过X射线光源来对物体进行成像过程中使用图像的位相衬度来反映物体的密度或者厚度分布,适用于弱吸收物体,还可以减少吸收剂量,放宽成像条件中光源强度的限制和减少对样品(尤其是生物样品)的损伤。介绍了目前用于X射线相位衬度CT的三种方法,实验及图像重建的过程,并分析了各自的优缺点。
X-ray phase-contrast computed tomography （CT） is based on the difference in phase contrast of the materials during imaging by X-ray to describe the density or thickness of the, materials. The use of phase contrast is suitable for weak-absorption materials and to diminish the total absorption dose, enhancing the conditions of the entire imaging procedure and decreasing the damage to the materials. In this paper, we introduce and compared three methods used for X-ray phase-contrast computed tomography, the experiments and the process of image reconstruction.
出处
《量子电子学报》
CAS
CSCD
北大核心
2005年第4期579-584,共6页
Chinese Journal of Quantum Electronics
