Hard X-ray phase-contrast tomography of non-homogeneous specimens: grating interferometry versus propagation-based imaging

X-ray phase-contrast imaging is an effective approach to drastically increase the contrast and sensitivity of microtomographic techniques. Numerous approaches to depict the real part of the complex-valued refractive index of a specimen are nowadays available. A comparative study using experimental data from grating-based interferometry and propagation-based phase contrast combined with single-distance phase retrieval applied to a non-homogeneous sample is presented (acquired at beamline ID19-ESRF). It is shown that grating-based interferometry can handle density gradients in a superior manner. The study underlines the complementarity of the two techniques for practical applications.

Source: Journal of Synchrotron Radiation - July 25, 2016 Category: Physics Authors: Ruiz-Yaniz, M. Zanette, I. Sarapata, A. Birnbacher, L. Marschner, M. Chabior, M. Olbinado, M. Pfeiffer, F. Rack, A. Tags: phase contrast X-ray microtomography phase retrieval X-ray imaging research papers Source Type: research