@article{discovery1468893, title = {Beam tracking approach for single-shot retrieval of absorption, refraction, and dark-field signals with laboratory x-ray sources}, journal = {APPLIED PHYSICS LETTERS}, number = {22}, volume = {106}, month = {June}, year = {2015}, note = {Copyright {\copyright} 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4922189]}, url = {http://dx.doi.org/10.1063/1.4922189}, author = {Vittoria, FA and Kallon, GKN and Basta, D and Diemoz, PC and Robinson, IK and Olivo, A and Endrizzi, M}, abstract = {We present the translation of the beam tracking approach for x-ray phase-contrast and dark-field imaging, recently demonstrated using synchrotron radiation, to a laboratory setup. A single absorbing mask is used before the sample, and a local Gaussian interpolation of the beam at the detector is used to extract absorption, refraction, and dark-field signals from a single exposure of the sample. Multiple exposures can be acquired when high resolution is needed, as shown here. A theoretical analysis of the effect of polychromaticity on the retrieved signals, and of the artifacts this might cause when existing retrieval methods are used, is also discussed.}, issn = {0003-6951} }