Theoretical and experimental analysis of the modulated phase grating X-ray interferometer

被引：1

作者：

Meyer, Hunter ^{[1
]}

Dey, Joyoni ^{[1
]}

Carr, Sydney ^{[1
,2
]}

Ham, Kyungmin ^{[3
]}

Butler, Leslie G. ^{[4
]}

Dooley, Kerry M. ^{[5
]}

Hidrovo, Ivan ^{[1
,6
]}

Bleuel, Markus ^{[7
]}

Varga, Tamas ^{[8
]}

Schulz, Joachim ^{[9
,10
]}

Beckenbach, Thomas ^{[9
]}

Kaiser, Konradin ^{[9
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Navy Med, Naval Dosimetry Ctr, Bethesda, MD 20889 USA

[3] Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA

[4] Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA

[5] Louisiana State Univ, Cain Dept Chem Engn, Baton Rouge, LA 70803 USA

[6] Solon Espinosa Ayala Oncol Hosp, Dept Radiat Therapy, Quito, Ecuador

[7] Adelphi Technol Inc, Redwood City, CA 94063 USA

[8] Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA USA

[9] Microworks GmbH, Schnetzlerstr 9, D-76137 Karlsruhe, Germany

[10] Karlsruhe Inst Technol, Inst Microstruct Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期

基金：

美国国家卫生研究院;

关键词：

X-ray interferometry; Modulated phase grating; Diffraction grating; Dark-field; Porosity; COMPUTED-TOMOGRAPHY; CONTRAST; DISTRIBUTIONS;

D O I：

10.1038/s41598-024-78133-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

X-ray grating interferometry allows for the simultaneous acquisition of attenuation, differential-phase contrast, and dark-field images, resulting from X-ray attenuation, refraction, and small-angle scattering, respectively. The modulated phase grating (MPG) interferometer is a recently developed grating interferometry system capable of generating a directly resolvable interference pattern using a relatively large period grating envelope function that is sampled at a pitch that is small enough that X-ray spatial coherence can be achieved by using a microfocus X-ray source or G0 grating. We present the theory of the MPG interferometry system for a 2-dimensional staggered grating, derived using Fourier optics, and we compare the theoretical predictions with experiments we have performed with a microfocus X-ray system at Pennington Biomedical Research Center, LSU. The theoretical and experimental fringe visibility is evaluated as a function of grating-to-detector distance. Additionally, quantitative experiments are performed with porous carbon and alumina compounds, and the mean normalized dark-field signal is compared with independent porosimetry measurements. Qualitative analysis of attenuation and dark-field images of a dried anchovy are shown.

引用

页数：15

共 39 条

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