A simulation study of optimized-aperture gratings for edge illumination cone-beam phase contrast x-ray imaging

Publication Type:

Conference Abstract

Authors:

Pieter-Jan Vanthienen; Jan Sijbers; Jan De Beenhouwer

Source:

Proceedings of the 6th International Conference on X-ray and Neutron Phase Imaging with Gratings, Shenzhen, China (2024)

Abstract:

Edge illumination (EI) is an established x-ray phase-contrast imaging method that relies on gratings to obtain attenuation, phase and dark field contrast. Despite the successful transition from synchrotron to lab sources, the cone-beam geometry of lab systems limits the effectiveness of conventional gratings. The non-parallel incidence of X-rays on planar gratings with equally sized apertures introduces unwanted shadowing effects. In this paper, a grating design with optimized position-dependent apertures is introduced and compared to a conventional grating and a grating with fan-beam shaped gratings bars. Numerical simulations show that this optimized-aperture design must be considered when constructing an EI setup.

Files: 
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Research area: 
X-ray imaging