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Chin. Phys. B, 2016, Vol. 25(2): 028704    DOI: 10.1088/1674-1056/25/2/028704

Simple phase extraction in x-ray differential phase contrast imaging

Xin Liu(刘鑫), Jin-Chuan Guo(郭金川), Yao-Hu Lei(雷耀虎), Ji Li(李冀), Han-Ben Niu(牛憨笨)
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

A fast and simple method to extract phase-contrast images from interferograms is proposed, and its effectiveness is demonstrated through simulation and experiment. For x-ray differential phase contrast imaging, a strong attenuation signal acts as an overwhelming background intensity that obscures the weak phase signal so that no obvious phase-gradient information is detectable in the raw image. By subtracting one interferogram from another, chosen at particular intervals, the phase signal can be isolated and magnified.

Keywords:  x-ray imaging      x-ray interferometry      Talbot and self-imaging effects      phase contrast imaging  
Received:  14 September 2015      Revised:  12 October 2015      Accepted manuscript online: 
PACS:  87.59.-e (X-ray imaging)  
  07.60.Ly (Interferometers)  
  42.30.Rx (Phase retrieval)  
  87.57.-s (Medical imaging)  

Project supported by the National Natural Science Foundation of China (Grant Nos. 61101175, 61571305, and 61227802).

Corresponding Authors:  Xin Liu     E-mail:

Cite this article: 

Xin Liu(刘鑫), Jin-Chuan Guo(郭金川), Yao-Hu Lei(雷耀虎), Ji Li(李冀), Han-Ben Niu(牛憨笨) Simple phase extraction in x-ray differential phase contrast imaging 2016 Chin. Phys. B 25 028704

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