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Proceedings Paper

Fourier transform image processing techniques for grid-based phase contrast imaging
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Paper Abstract

A recently developed technique for phase imaging using table top sources is to use multiple fine-pitch gratings. However, the strict manufacturing tolerences and precise alignment required have limited the widespread adoption of grating-based techniques. In this work, we employ a technique recently demonstrated by Bennett et al.1 that ultilizes a single grid of much coarser pitch. Phase is extracted using Fourier processing on a single raw image taken using a focused mammography grid. The effects on the final image of varying grid, object, and detector distances, window widths, and of a variety of windowing functions, used to separate the harmonics, were investigated.

Paper Details

Date Published: 5 September 2014
PDF: 8 pages
Proc. SPIE 9209, Advances in Computational Methods for X-Ray Optics III, 920913 (5 September 2014); doi: 10.1117/12.2062889
Show Author Affiliations
Sajjad Tahir, Univ. at Albany (United States)
Sajid Bashir, Univ. at Albany (United States)
Jonathan C. Petruccelli, Univ. at Albany (United States)
C. A. MacDonald, Univ. at Albany (United States)

Published in SPIE Proceedings Vol. 9209:
Advances in Computational Methods for X-Ray Optics III
Manuel Sanchez del Rio; Oleg Chubar, Editor(s)

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