X-ray Talbot-Lau interferometer for high-speed phase imaging and tomography using white synchrotron radiation

Margie P. Olbinado, Sébastien Harasse, Wataru Yashiro, Atsushi Momose

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

The Talbot interferometer using white synchrotron radiation has already been demonstrated for high-speed X-ray phase imaging and tomography as well as four-dimensional phase tomography for an observation of a dynamic specimen. In those previous experiments, the grating lines were oriented horizontally because the synchrotron radiation source size is large in the horizontal direction, and only the vertical spatial coherence satisfies the requirement for the operation of the Talbot interferometer given its distance from the source. For non-rigid samples, the horizontal axis of rotation causes unwanted motion of the sample due to gravity which results to artifact in the tomography reconstruction. For fluid samples, a vertical rotation axis is certainly necessary. While it is possible to orient the sample rotation axis perpendicular to the grating lines of the Talbot interferometer, solving the definite integral of the differential phase images to obtain the phase shift for x-ray phase tomography proves to be cumbersome when the sample extends outside the image and there is no null region for which the integration constant is known. In this work we aimed at increasing the spatial coherence of the x-rays along the horizontal so that the grating lines and the sample rotation axis could be oriented vertically. A Talbot-Lau interferometer was constructed by adding an absorption grating which acted as vertical line sources of horizontally spatially coherent white synchrotron radiation to the Talbot interferometer. An average of 20% moiré fringe visibility was obtained. The set-up was demonstrated for highspeed phase tomography of a polymer sample.

本文言語English
ホスト出版物のタイトルInternational Workshop on X-Ray and Neutron Phase Imaging with Gratings
ページ266-271
ページ数6
DOI
出版ステータスPublished - 2012 12 1
外部発表はい
イベントInternational Workshop on X-Ray and Neutron Phase Imaging with Gratings, XNPIG 2012 - Tokyo, Japan
継続期間: 2012 3 52012 3 7

出版物シリーズ

名前AIP Conference Proceedings
1466
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherInternational Workshop on X-Ray and Neutron Phase Imaging with Gratings, XNPIG 2012
国/地域Japan
CityTokyo
Period12/3/512/3/7

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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