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A Simulation Study on the Transfer Characteristics of the Talbot Pattern Through Scintillation Screens in the Grating Interferometer

격자 간섭계에서 탈봇 패턴의 섬광체 스크린 투과 시 전달 특성에 대한 시뮬레이션 연구

  • Kim, Daeseung (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Youngju (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Seho (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Seung Wook (School of Mechanical Engineering, Pusan National University)
  • 김대승 (이승욱 부산대학교 기계공학부) ;
  • 김영주 (이승욱 부산대학교 기계공학부) ;
  • 이세호 (이승욱 부산대학교 기계공학부) ;
  • 이승욱 (이승욱 부산대학교 기계공학부)
  • Received : 2019.01.25
  • Accepted : 2019.02.25
  • Published : 2019.02.28

Abstract

Grating interferometry based imaging technology is a kind of radiation imaging system, which can acquire not only absorption image but also phase difference and dark field image using the Talbot pattern. However, because of the technological difficulties and high cost of fabricating the gratings that make up the system, much efforts are being made to look for ways to replace them. The is a preliminary study to see how the Talbot pattern transfer through various kinds of scintillators and if the optical grating can be a way to replace the conventional absorption gratings. The geometry of the interferometer, the scintillator model, and the scintillator thickness are the main inputs for our simulation. We have used the concept of modulation for quantitative analysis of the contrast ratio of the Talbot pattern. This research is expected to provide very useful information on the design of optical gratings, which is an alternative way to analyze the Talbot pattern, which we have filed a patent on.

Keywords

References

  1. Rontgen WC. On a new kind rays. Science New Series. 1896;3(59):227-31.
  2. Wen H, Bennett EE, Monica MH, Rapacchi S. Fourier X-ray scattering radiolography yields bone structural information. 2009;251(3):910-8. https://doi.org/10.1148/radiol.2521081903
  3. Stutman D, Beck TJ, Carrino JA, Bingham CO. Talbot phase-contrast X-ray imaging for the small joints of the hand. Institute of Physics and Engineering in Medicine. 2011;56.
  4. Oh O, Lee SW. Comparison Study on Projection and Backprojection Methods for CT Simulation. Journal of Radiological Science and Technology. 2014;37(4): 323-30.
  5. Talbot HF. Facts relating to optical science. Philosophical Magzine and journal of science. 1836;9(56).
  6. Kim Y, Oh O, Kim J, Lee SW. Study on Talbot pattern for grating interferometer. Journal of Radiological Science and Technology. 2015;38(1):39-49. https://doi.org/10.17946/JRST.2015.38.1.06
  7. Fitzgerald R. Phase-sensitive X-ray imaging. Physics Today. 2000;53(7):23-6. https://doi.org/10.1063/1.1292471
  8. Momose A. Recent advances in X-ray phase imaging. Japanese Journal of Applied Physics. 2005;44:6355-67. https://doi.org/10.1143/JJAP.44.6355
  9. David C, Nohammer B, Solak HH, Ziegler E. Differential x-ray phase contrast imaging using a shearing interferometer. Applied Physics Letters. 2002;81(17)
  10. Bech M. X-ray imaging with a grating interferometer [Ph.D thesis]. University of Copenhagen; 2009.
  11. Mohr J, Grund T, Kunka D, Kenntner J, Leuthold J, Meiser J. High aspect ratio gratings for X-ray phase contrast imaging. AIP Conference Proceedings. 2012;1466(41).
  12. Tiwari P, Mondal Puspen, Srivastava AK, Naik PA. Fabrication of high aspect ratio submicron gratings on -100nm titanium membranes using electron beam lithography. AIP Conference Proceedings. 2017;1832.
  13. Kim Y, Kim J, Kim D, Hussey D, Lee SW. Review of scientific instruments. 2018;89 033701. https://doi.org/10.1063/1.5009702
  14. Lee SW. et al. Korean patent file no. 10-2018-0008924.
  15. Swank RK. Calculation of modulation transfer functions of X-ray fluorescent screen. Applied Optics. 1973;12:1865-70. https://doi.org/10.1364/AO.12.001865
  16. Szewc C. Molecule interference in the near-field Talbot regime [Ph.D thesis]. University of Southampton; 2012.