title: Reduction of phase artifacts in differential phase contrast computed tomography.
abstract: X-ray differential phase contrast computed tomography (DPC CT) with a Talbot-Lau interferometer setup allows visualizing the three-dimensional distribution of the refractive index by measuring the shifts of an interference pattern due to phase variations of the X-ray beam. Unfortunately, severe reconstruction artifacts appear in the presence of differential phase wrapping and clipping. In this paper, we propose to use the attenuation contrast, which is obtained from the same measurement, for correcting the DPC signal. Using the example of a DPC CT measurement with pronounced phase artifacts, we will discuss the efficiency of our phase artifact correction method.
authors: Empa, Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland. iwan.jerjen@empa.ch
authors: Iwan
authors: I
authors: Jerjen
authors: Vincent
authors: V
authors: Revol
authors: Philipp
authors: P
authors: Schuetz
authors: Christian
authors: C
authors: Kottler
authors: Rolf
authors: R
authors: Kaufmann
authors: Thomas
authors: T
authors: Luethi
authors: Konstantins
authors: K
authors: Jefimovs
authors: Claus
authors: C
authors: Urban
authors: Urs
authors: U
authors: Sennhauser
mesh_terms: D000465:Algorithms; D016477:Artifacts; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*