eprintid: 1448709 rev_number: 39 eprint_status: archive userid: 608 dir: disk0/01/44/87/09 datestamp: 2014-09-23 08:51:35 lastmod: 2021-09-19 23:56:48 status_changed: 2014-09-23 08:51:35 type: article metadata_visibility: show item_issues_count: 0 creators_name: Cipiccia, S creators_name: Vittoria, FA creators_name: Weikum, M creators_name: Olivo, A creators_name: Jaroszynski, DA title: Inclusion of coherence in Monte Carlo models for simulation of x-ray phase contrast imaging ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F42 keywords: general science note: This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.22.023480. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. abstract: Interest in phase contrast imaging methods based on electromagnetic wave coherence has increased significantly recently, particularly at X-ray energies. This is giving rise to a demand for effective simulation methods. Coherent imaging approaches are usually based on wave optics, which require significant computational resources, particularly for producing 2D images. Monte Carlo (MC) methods, used to track individual particles/photons for particle physics, are not considered appropriate for describing coherence effects. Previous preliminary work has evaluated the possibility of incorporating coherence in Monte Carlo codes. However, in this paper, we present the implementation of refraction in a model that is based on time of flight calculations and the Huygens-Fresnel principle, which allow reproducing the formation of phase contrast images in partially and fully coherent experimental conditions. The model is implemented in the FLUKA Monte Carlo code and X-ray phase contrast imaging simulations are compared with experiments and wave optics calculations. date: 2014-09-18 publisher: OSA official_url: http://dx.doi.org/10.1364/OE.22.023480 vfaculties: VENG oa_status: green full_text_type: other language: eng primo: open primo_central: open_green article_type_text: Article verified: verified_manual elements_source: Manually entered elements_id: 975598 doi: 10.1364/OE.22.023480 lyricists_name: Cipiccia, Silvia lyricists_name: Olivo, Alessandro lyricists_name: Vittoria, Fabio lyricists_id: SCIPI67 lyricists_id: AOLIV86 lyricists_id: VITTO07 full_text_status: public publication: Optics Express volume: 22 number: 19 place_of_pub: USA pagerange: 23480 - 23488 pages: 9 event_location: USA issn: 1094-4087 citation: Cipiccia, S; Vittoria, FA; Weikum, M; Olivo, A; Jaroszynski, DA; (2014) Inclusion of coherence in Monte Carlo models for simulation of x-ray phase contrast imaging. Optics Express , 22 (19) 23480 - 23488. 10.1364/OE.22.023480 <https://doi.org/10.1364/OE.22.023480>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/1448709/1/Cipiccia_OptExp2014_revised.pdf