X-ray computed tomography reconstruction algorithm for refractive index gradient

分类： 物理学 >> 电磁学、光学、声学、传热、经典力学和流体动力学 提交时间： 2023-09-06

Keliang Liao Qili He Panyun Li Liang Luo Peiping Zhu

摘要： Theaim of this researchis to reconstruct the 3D X-ray refractive index gradient mapsbythe proposed vector Radon transform and its inverse, assuming that the small-angle deviation condition is met. Theoretical analysesshowthat the X-ray beam can be modeled as a streamline with continuous change of direction in a rowwhen measured in one grating period, which allowsthe extraction of the refraction angle signals.Experimental results show thatall the 2D refraction signals of different directions can be acquired by a standard circular scanning procedure, which is typically used in the X-ray differential phase-contrast computed tomography. Furthermore, the 3D refractive index gradient maps that contain the directional density changes, can also be accurately reconstructed.

通过

 点击量 3849  下载量 204  评论