Iterative reconstruction in X-ray computed laminography from differential phase measurements

Sébastien Harasse, Wataru Yashiro, Atsushi Momose

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Phase-contrast X-ray computed laminography is demonstrated for the volume reconstruction of extended flat objects, not suitable to the usual tomographic scan. Using a Talbot interferometer, differential phase measurements are obtained and used to reconstruct the real part of the complex refractive index. The specific geometry of laminography leads to unsampled frequencies in a double cone in the reciprocal space, which degrades the spatial resolution in the direction normal to the object plane. First, the filtered backprojection formula from differential measurements is derived. Then, reconstruction is improved by the use of prior information of compact support and limited range, included in an iterative filtered backprojection algorithm. An implementation on GPU hardware was required to handle the reconstruction of volumes within a reasonable time. A synchrotron radiation experiment on polymer meshes is reported and results of the iterative reconstruction are compared with the simpler filtered backprojection.

本文言語English
ページ(範囲)16560-16573
ページ数14
ジャーナルOptics Express
19
17
DOI
出版ステータスPublished - 2011 8月 15
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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