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

Summary, in English

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.

• Författare: Jian Fu; Simone Schleede; Renbo Tan; Liyuan Chen; Martin Bech; Klaus Achterhold; Martin Gifford; Rod Loewen; Ronald Ruth; Franz Pfeiffer
• Avdelning/ar: Medicinsk strålningsfysik, Lund
• Publiceringsår: 2013
• Språk: Engelska
• Sidor: 186-193
• Publikation/Tidskrift/Serie: Zeitschrift für Medizinische Physik
• Volym: 23
• Issue: 3
• Länkar: http://dx.doi.org/10.1016/j.zemedi.2012.11.002
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Radiology, Nuclear Medicine and Medical Imaging
• Nyckelord: Differential phase-contrast imaging; computed tomography; reconstruction; algorithm; algebraic itrative reconstruction
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1876-4436