Open AccessX-ray phase, absorption and scatter retrieval using two or more phase contrast images
Author(s) -
Marcus J. Kitchen,
David M. Paganin,
Kentaro Uesugi,
Beth J. Allison,
Robert A. Lewis,
Stuart B. Hooper,
Konstantin Mikhailovitch Pavlov
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.019994
Subject(s) - phase retrieval , optics , phase contrast imaging , phase (matter) , refraction , analyser , contrast (vision) , scattering , absorption (acoustics) , materials science , physics , phase contrast microscopy , fourier transform , quantum mechanics
We have developed two phase-retrieval techniques for analyser-based phase contrast imaging that provide information about an object's X-ray absorption, refraction and scattering properties. The first requires rocking curves to be measured with and without the sample and improves upon existing techniques by accurately fitting the curves with Pearson type VII functions. The second employs an iterative approach using two simultaneously recorded images by exploiting the Laue crystal geometry. This technique provides a substantial reduction in X-ray dose and enables quantitative phase retrieval to be performed on images of moving objects.