Abstract
When a very-low-absorbing sample is scanned at an x-ray computed tomography setup with a microfocus x-ray tube and a high-resolution detector, the obtained projection images contain not only absorption contrast but also phase contrast. While images without a phase signal can be reconstructed very well, such mixed phase and absorption images give rise to severe artifacts in the reconstructed slices. A method is described that applies a correction to these mixed projections to remove the phase signal. These corrected images can then be processed using a standard filtered backprojection algorithm to obtain reconstructions with only few or no phase artifacts. This new method, which we call the Bronnikov-aided correction (BAC), can be used in a broad variety of applications and without much additional effort. It is tested on a biological and a pharmaceutical sample, and results are evaluated and discussed by comparing them with those of conventional reconstruction methods.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
Erik L. G. Wernersson, Matthieu N. Boone, Jan Van den Bulcke, Luc Van Hoorebeke, and Cris L. Luengo Hendriks
J. Opt. Soc. Am. A 30(3) 455-461 (2013)
Linda C. P. Croton, Gary Ruben, Kaye S. Morgan, David M. Paganin, and Marcus J. Kitchen
Opt. Express 27(10) 14231-14245 (2019)
Andrei V. Bronnikov
J. Opt. Soc. Am. A 19(3) 472-480 (2002)