Line integral retrieval and reconstruction for X-ray fan-beam differential phase contrast CT
A reconstruction technique for X-ray fan-beam differential phase-contrast computed tomography (DPC-CT) was reported in this paper.It consists of two steps which are line integral retrieval from the recorded DPC-CT projections and image reconstruction.The first step is performed using a retrieval filter which roots in the derivative property of Fourier transform and takes into account the differential nature of DPCCT projections.The second step is implemented by the classical fan-beam absorption-contrast filtered back-projection (FBP) algorithms.This work comprises a numerical study of the method and its experimental verification using a dataset measured with an X-ray DPC-CT system consisted of a threegrating interferometer and a mini-focus x-ray tube source.The results indicate that normalized root square error of the proposed method is 0.2532 and the reconstruction accuracy is improved 87% compared with direct FBP reconstruction.
X-ray imaging computed tomography grating interferometer differential phase contrast phase retrieval image reconstruction
Jian Fu Zhen-zhong Liu
School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing, China
国际会议
秦皇岛
英文
1348-1351
2015-09-18（万方平台首次上网日期，不代表论文的发表时间）