Fourier transform phase retrieval for x-ray phase-contrast imaging based on cascaded Talbot-Lau interferometers

被引：4

作者：

Huang, Jianheng ^{[1
]}

Wali, Faiz ^{[1
]}

Lei, Yaohu ^{[1
]}

Liu, Xin ^{[1
]}

Li, Ji ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen, Peoples R China

来源：

OPTICAL ENGINEERING | 2020年 / 59卷 / 03期

基金：

中国国家自然科学基金;

关键词：

x-ray imaging; phase retrieval; Fourier transform; cascaded interferometer; FABRICATION;

D O I：

10.1117/1.OE.59.3.033101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Long exposure time is one of the major limitations in x-ray phase-contrast imaging (XPCI). Therefore, we demonstrate a promising alternative method for grating-based XPCI coupled with cascaded Talbot-Lau interferometers (TLIs). A Fourier analysis of the moire fringe patterns generated by the interferometers was used to obtain the multicontrast images (such as absorption, differential phase-contrast, and normalized visibility-contrast images) with a single exposure. The cascaded configuration with TLI and inverse TLI using large-period absorption gratings was established to verify the effectiveness of the algorithm and three multicontrast images of a polytetrafluoroethylene (PTFE) tube were obtained experimentally. The groove structures in the PTFE can be clearly identified in the differential phase-contrast image. This method shows potential for application of cascaded TLI in medical imaging. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：8

共 32 条

[1]

[Anonymous], PHILOS T A

[2] AN X-RAY INTERFEROMETER [J].