Fast three-dimensional phase retrieval in propagation-based x-ray tomography

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dc.contributor.authorThompson D
dc.contributor.authorNesterets YI
dc.contributor.authorPavlov KM
dc.contributor.authorGureyev T
dc.date.accessioned2018-12-03T23:15:09Z
dc.date.available2018-12-03T23:15:09Z
dc.date.issued2018en
dc.date.updated2018-10-31T19:34:18Z
dc.description.abstractThe following paper describes a method for three-dimensional (3D) reconstruction of multi-material objects based on propagation-based X-ray phase-contrast tomography (PB-CT) with phase retrieval using the homogenous form of the Transport-of-Intensity equation (TIE-Hom). Unlike conventional PB-CT algorithms that perform phase retrieval of individual projections, the described post-reconstruction phase-retrieval method is applied in 3D to a localised region of the CT-reconstructed volume. We demonstrate via numerical simulations the accuracy and noise characteristics of the method under a variety of experimental conditions, comparing it to both conventional absorption tomography and two-dimensional (2D) TIE-Hom phase retrieval applied to projection images. The results indicate that the 3D post-reconstruction method generally achieves a modest improvement in noise suppression over existing PB-CT methods. It is also shown that potentially large computational gains over projection-based phase retrieval for multi-material samples are possible. In particular, constraining phase retrieval to a localised 3D region of interest reduces the overall computational cost and eliminates the need for multiple CT reconstructions and global 2D phase retrieval operations for each material within the sample.en
dc.identifier.urihttp://hdl.handle.net/10092/16267
dc.language.isoen
dc.subjectphysics.med-phen
dc.subject.anzsrcFields of Research::51 - Physical sciences::5105 - Medical and biological physics::510502 - Medical physicsen
dc.subject.anzsrcField of Research::11 - Medical and Health Sciences::1103 - Clinical Sciences::110320 - Radiology and Organ Imagingen
dc.subject.anzsrcFields of Research::51 - Physical sciences::5105 - Medical and biological physics::510501 - Biological physicsen
dc.titleFast three-dimensional phase retrieval in propagation-based x-ray tomographyen
dc.typeJournal Articleen
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