Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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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
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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.

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References

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