title: Phase retrieval in X-ray phase-contrast imaging suitable for tomography.
abstract: In-line phase-contrast X-ray imaging provides images where both absorption and refraction contribute. For quantitative analysis of these images, the phase needs to be retrieved numerically. There are many phase-retrieval methods available. Those suitable for phase-contrast tomography, i.e., non-iterative phase-retrieval methods that use only one image at each projection angle, all follow the same pattern though derived in different ways. We outline this pattern and use it to compare the methods to each other, considering only phase-retrieval performance and not the additional effects of tomographic reconstruction. We also outline derivations, approximations and assumptions, and show which methods are similar or identical and how they relate to each other. A simple scheme for choosing reconstruction method is presented, and numerical phase-retrieval performed for all methods.
authors.affiliation: Biomedical and X-Ray Physics, Royal Institute of Technology, AlbaNova University Center, SE-10691Stockholm, Sweden. anna.burvall@biox.kth.se
authors.forename: Anna
authors.initials: A
authors.lastname: Burvall
authors.forename: Ulf
authors.initials: U
authors.lastname: Lundström
authors.forename: Per A C
authors.initials: PA
authors.lastname: Takman
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Larsson
authors.forename: Hans M
authors.initials: HM
authors.lastname: Hertz
mesh_terms: D000042:Absorption; D000465:Algorithms; D004867:Equipment Design; D008422:Materials Testing; D008858:Microscopy, Phase-Contrast / Q000379:methods*; D015233:Models, Statistical; D055095:Optics and Photonics; D017785:Photons; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014965:X-Rays