title: Phase retrieval for hard X-ray computed tomography of samples with hybrid compositions.
abstract: X-ray tomography of samples containing both weakly and strongly absorbing materials are necessary in material and biomedical imaging. Extending the validity of the phase-attenuation duality (PAD) method, the propagation-based phase-contrast computed tomography (PPCT) of a sample with hybrid compositions of both the light and dense components with 60 keV of synchrotron radiation is investigated. The experimental results show that the PAD-based PPCT is effective in imaging both the weakly and strongly absorbing components simultaneously. Compared with the direct PPCT technique, the PAD-based PPCT technique demonstrates its excellent capability in material discrimination and characterization. In addition, the PAD-based PPCT exhibits a striking performance on the image contrast enhancement and noise suppression. Therefore, this technique is useful for material and biomedical imaging applications, especially when the radiation dose involved imposes a serious constraint.
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China.
authors.forename: Huiqiang
authors.initials: H
authors.lastname: Liu
authors.forename: Yuqi
authors.initials: Y
authors.lastname: Ren
authors.forename: Han
authors.initials: H
authors.lastname: Guo
authors.forename: Yanling
authors.initials: Y
authors.lastname: Xue
authors.forename: Honglan
authors.initials: H
authors.lastname: Xie
authors.forename: Tiqiao
authors.initials: T
authors.lastname: Xiao
authors.forename: Xizeng
authors.initials: X
authors.lastname: Wu