Hard X-ray phase imaging and tomography using a grating interferometer

An interferometric technique for hard X-rays is presented. It is based on two transmission gratings and a phase-stepping technique, and it provides separate radiographs of the phase and absorption profiles of bulk samples. Tomographic reconstruction yields quantitative three-dimensional maps of the X-ray refractive index and of the attenuation coefficient, with a spatial resolution down to a few microns. The method is mechanically robust, it requires little monochromaticity, and can be scaled up to large fields of view. These are important prerequisites for use with laboratory X-ray sources. Numerous applications ranging from wave front sensing to medical radiography are presently under investigation.


Published in:
Spectrochimica Acta B : Atomic Spectroscopy, 62, 6-7, 626-630
Year:
2007
ISSN:
0584-8547
Laboratories:




 Record created 2007-10-11, last modified 2018-01-28


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