Beam tracking phase tomography with laboratory sources

Increased robustness and speed in low-dose phase-contrast tomography with laboratory sources

In this article we discuss three different developments in Edge Illumination (EI) X-ray phase contrast imaging (XPCi), all ultimately aimed at optimising EI computed tomography (CT) for use in different environments, and for different applications. For the purpose of reducing scan times, two approaches are presented; the “reverse projection” acquisition scheme which allows a continuous rotation...

Single-Shot X-Ray Phase-Contrast Computed Tomography with Nonmicrofocal Laboratory Sources

P. C. Diemoz, C. K. Hagen, M. Endrizzi, M. Minuti, R. Bellazzini, L. Urbani, P. De Coppi, and A. Olivo Department of Medical Physics and Biomedical Engineering, UCL, WC1E 6BT London, United Kingdom PIXIRAD Imaging Counters s.r.l., c/o INFN Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy INFN, Pisa Section, Largo B. Pontecorvo 3, 56127 Pisa, Italy UCL, Institute of Child Health and Great Ormond S...

Beam tracking approach for single–shot retrieval of absorption, refraction, and dark–field signals with laboratory x–ray sources

Low-dose phase contrast tomography with conventional x-ray sources.

PURPOSE The edge illumination (EI) x-ray phase contrast imaging (XPCi) method has been recently further developed to perform tomographic and, thus, volumetric imaging. In this paper, the first tomographic EI XPCi images acquired with a conventional x-ray source at dose levels below that used for preclinical small animal imaging are presented. METHODS Two test objects, a biological sample and ...

X–ray absorption, phase and dark–field tomography through a beam tracking approach

We present a development of the beam-tracking approach that allows its implementation in computed tomography. One absorbing mask placed before the sample and a high resolution detector are used to track variations in the beam intensity distribution caused by the sample. Absorption, refraction, and dark-field are retrieved through a multi-Gaussian interpolation of the beam. Standard filtered bac...