@inproceedings{discovery1323175,
         journal = {10TH INTERNATIONAL CONFERENCE ON X-RAY MICROSCOPY},
           pages = {254--257},
       booktitle = {Proceedings of the 10th International Conference on X-ray Microscopy},
           title = {Phase Contrast Imaging with Coded Apertures Using Laboratory-Based X-ray Sources},
       publisher = {American Institute of Physics (AIP)},
            note = {This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.},
          volume = {1365},
          series = {AIP Conference Proceedings},
         address = {Chicago, IL, USA},
           month = {September},
          editor = {I McNulty and C Eyberger and B Lai},
            year = {2011},
            issn = {0094-243X},
          author = {Ignatyev, K and Munro, PRT and Speller, RD and Olivo, A},
             url = {http://dx.doi.org/10.1063/1.3625352},
        abstract = {X-ray phase contrast imaging is a powerful technique that allows detection of changes in the phase of x-ray wavefronts as they pass through a sample. As a result, details not visible in conventional x-ray absorption imaging can be detected. Until recently the majority of applications of phase contrast imaging were at synchrotron facilities due to the availability of their high flux and coherence; however, a number of techniques have appeared recently that allow phase contrast imaging to be performed using laboratory sources. Here we describe a phase contrast imaging technique, developed at University College London, that uses two coded apertures. The x-ray beam is shaped by the pre-sample aperture, and small deviations in the x-ray propagation direction are detected with the help of the detector aperture. In contrast with other methods, it has a much more relaxed requirement for the source size (it works with source sizes up to 100 {\ensuremath{\mu}}m). A working prototype coded-aperture system has been built. An x-ray detector with directly deposited columnar CsI has been used to minimize signal spill-over into neighboring pixels. Phase contrast images obtained with the system have demonstrated its effectiveness for imaging low-absorption materials.}
}