Differential X-ray phase-contrast imaging with a grating interferometer using a laboratory X-ray micro-focus tube

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• 作者：Kwon-Ha Yoon (1)
  Jong Hyun Ryu (1)
  Chang Won Jung (1)
  Cheol Woo Ryu (2)
  Young Jo Kim (2)
  Young Man Kwon (2)
  Miran Park (3)
  Seungryong Cho (3)
  Kwon Su Chon (4)
  
  1. Department of Radiology and Imaging Science Research Center ; Wonkwang University School of Medicine ; Iksan ; 570-749 ; Korea
  2. Radiation Imaging Technology Center ; Jeonbuk Technopark ; Iksan ; 570-802 ; Korea
  3. Department of Nuclear and Quantum Enginnering ; Korea Advanced Institute of Science and Technology ; Daejeon ; 305-701 ; Korea
  4. Department of Radiological Science ; Catholic University of Daegu ; Gyeongsan ; 712-702 ; Korea
  
• 关键词：X ; ray phase contrast image ; Talbot interferometer ; Phase stepping ; Diffraction grating
• 刊名：Journal of the Korean Physical Society
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：65
• 期：12
• 页码：2111-2116
• 全文大小：1,142 KB
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• 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
• 出版者：Springer Netherlands
• ISSN：1976-8524

文摘

X-ray phase-contrast imaging can provide images with much greater soft-tissue contrast than conventional absorption-based images. In this paper, we describe differential X-ray phase-contrast images of insect specimens that were obtained using a grating-based Talbot interferometer and a laboratory X-ray source with a spot size of a few tens of micrometers. We developed the interferometer on the basis of the wavelength, periods, and height of the gratings; the field of view depends on the size of the grating, considering the refractive index of the specimen. The phase-contrast images were acquired using phase-stepping methods. The phase contrast imaging provided a significantly enhanced soft-tissue contrast compared with the attenuation data. The contour of the sample was clearly visible because the refraction from the edges of the object was strong in the differential phase-contrast image. Our results demonstrate that a grating-based Talbot interferometer with a conventional X-ray tube may be attractive as an X-ray imaging system for generating phase images. X-ray phase imaging obviously has sufficient potential and is expected to soon be a great tool for medical diagnostics.