An algebraic iterative reconstruction technique for differential X-ray phase-contrast computed tomography

Jian Fu, Simone Schleede, Renbo Tan, Liyuan Chen, Martin Bech, Klaus Achterhold, Martin Gifford, Rod Loewen, Ronald Ruth, Franz Pfeiffer

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Iterative reconstruction has a wide spectrum of proven advantages in the field of conventional X-ray absorption-based computed tomography (CT). In this paper, we report on an algebraic iterative reconstruction technique for grating-based differential phase-contrast CT (DPC-CT). Due to the differential nature of DPC-CT projections, a differential operator and a smoothing operator are added to the iterative reconstruction, compared to the one commonly used for absorption-based CT data. This work comprises a numerical study of the algorithm and its experimental verification using a dataset measured at a two-grating interferometer setup. Since the algorithm is easy to implement and allows for the extension to various regularization possibilities, we expect a significant impact of the method for improving future medical and industrial DPC-CT applications.

Original languageEnglish
Pages (from-to)186-193
Number of pages8
JournalZeitschrift fur Medizinische Physik
Volume23
Issue number3
DOIs
StatePublished - Sep 2013

Keywords

  • Algebraic itrative reconstruction
  • Computed tomography
  • Differential phase-contrast imaging
  • Reconstruction algorithm

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