Single-image geometric-flow x-ray speckle tracking

被引：50

作者：

Paganin, David M. ^{[1
]}

Labriet, Helene ^{[2
,3
]}

Brun, Emmanuel ^{[3
]}

Berujon, Sebastien ^{[4
]}

机构：

[1] Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia

[2] Novitom, 3 Ave Doyen Louis Weil, F-38000 Grenoble, France

[3] Univ Grenoble Alpes, Rayonnnement Synchrotron & Rech Med, F-38000 Grenoble, France

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 05期

关键词：

PHASE;

D O I：

10.1103/PhysRevA.98.053813

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a speckle-tracking method for x-ray phase-contrast imaging, based on the concept of geometric flow. This flow is a conserved current associated with deformation of illuminating x-ray speckles induced by passage through a sample. The method provides a rapid, efficient, and accurate algorithm for quantitative phase imaging. It is highly photon efficient and able to image dynamic objects, since a single radiograph of the sample is sufficient for the phase recovery. We experimentally quantify the resolution and contrast of the approach with both two-dimensional and three-dimensional phase-imaging applications using x-ray synchrotron radiation. Finally, we discuss adaptations of the method to imaging with compact x-ray sources that have a large source size and significant spectral bandwidth.

引用

页数：6

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