Evaluation of Relative Emission of Image Plate by Using Relative Sensitivity in Computed Radiography System

컴퓨터 방사선영상시스템에서 비감도를 이용한 영상판의 상대적 발광량 평가

  • 성열훈 (청주대학교 방사선학과)
  • Received : 2014.07.15
  • Accepted : 2014.09.20
  • Published : 2014.11.28


The aim of the present study was to evaluate a relative emission of image plate (IP) in computed radiography (CR) system by using relative sensitivity in film/screen methods. The characteristic curve was obtained by using the uniform aluminum 11-step wedge penetrometer. X-ray exposure factors on radiographic digital image were 50 kVp, 10 mAs. We adjusted zero of all parameter of algorithms (MUSICA) so proximate to raw data and applied to 200 of exposure class. Modeling on relative emission of IP are used IP without fading time and IP after 4 hours, 8 hours, 12 hours, 24 hours in the respective storage after X-ray exposure. The results of this study showed that the sensitivity point density at the measuring of relative sensitivity in CR was suited pixel values of the 2000 easy to relatively measure the characteristic curve and when relative sensitivity is decreased, the amount of light emitted from the image signal for generating was also decreased. In conclusion, the proposed method of measurement of relative sensitivity can be utilized to evaluate the quantity of relative emission of IP in CR system.


Computed Radiography;Relative Sensitivity;Relative Emission;Image Plate


  1. K. Doi, "Diagnostic imaging over the last 50 years: research and development in medical imaging science and technology," Phys Med Biol, Vol.5, pp.R5-R27, 2006.
  2. 허준, 이인자, "增感紙-필름系의 相對感度와 絶對 感度에 관한 實驗", 한국방사선기술연구회지, 제16권, 제1호, pp.67-80, 1993.
  3. Z. F. Lu, E. L. Nickoloff, J. C. So, and A. K. Dutta, "Comparison of computed radiography and film/screen combination using a contrast-detail phantom," J Appl Clin Med Phys, Vol.4, No.1, pp.91-98, 2003.
  4. J. Y. Jung, H. S. Park, H. M. Cho, C. L. Lee, S. R. Nam, Y. J. Lee, and H. J. Kim, "Imaging Characteristics of Computed Radiography Systems," Korean J Med Phys, Vol.19, No.1, pp.63-72, 2008.
  5. K. Takahashi, J. Miyahara, Y. Shibahara, Miyahara, and Y. Shibahara, "Photostimulated Luminescence (PSL) and Color Centers in BaFX : Eu2+(X=Cl, Br, I) Phosphors," J Electrochem Soc, Vol.132, No.6, pp.1492-1494, 1985.
  6. D. M. de Leeuw, T. Kovats, and S. P. Herko, "Kinetics of Photostimulated Luminescence in BaFBr:Eu, Phosphors," J Electrochem Soc, Vol.134, No.2, pp.491-493, 1987.
  7. H. von Seggern, T. Voigt, W. Knupfer, and G. Lange, "Physical model of photostimulated luminescence of x-ray irradiated BaFBr:$Eu^{2+}$," J Appl Phys, Vol.64, No.3, pp.1405-1412, 1998.
  8. N. Pongnapang, "Practical guidelines for radiographers to improve computed radiography image quality," Biomed Imaging Interv J, Vol.1, No.2, pp.18-22, 2005.
  9. A. Tingberg and D. Sjostrom, "Optimisation of image plate radiography with respect to tube voltage," Radiat Prot Dosimetry, Vol.114, No.1-3, pp.286-293, 2005.
  10. 대한영상의학회, 특수의료장비 확대대상 장비의 품질검사기준 개발 연구(영상장비), 보건복지부, 2011.
  11. 성열훈, "변조전달함수를 이용한 컴퓨터 방사선 영상의 감도 노출 분류에 따른 공간분해능 평가", 디지털융복합연구지, 제11권, 제8호, pp.273-279, 2013.
  12. 곽지연, 이경범, 이종만, 박태순, 오필제, 이민기, 서지숙, 황한열, "Imaging plate를 이용한 극저준위 방사능 측정에 관한 연구", 방사선방어학회지, 제29권, 제4호, pp.231-236, 2004.
  13. 임보연, 박혜숙, 김주혜, 박광현, 김희중, "CR 시스템에서 IP 잠상의 소거 후 Unexposed Image의 평가", 한국의학물리학회지, 제20권, 제4호, pp.199-207, 2009.
  14. R. R. Cariton and A. M. Adler, Principles of Radiographic Imaging: An Art and a Science, 5th Edition, DELMAR CENGAGE Learning, 2013.
  15. T. Saze, M. Etoh, C. Mori, and K. Nishizawa, "Automatic activity measurement and data processing system using image analyzer, Nuclear Instruments and Methods in Physics Research Section A," Vol.443, No.2-3, pp.578-585, 2000.
  16. 우민선, 이재승, 임인철, "전산화 방사선촬영(CR) 시스템을 이용한 근사적 의료 피폭 선량 평가", 한국방사선학회지, 제6권, 제6호, pp.455-464, 2012.
  17. 동경래, 최준구, 홍성일, "Computed Radiography 영상에서 Parameter에 의한 Artifact 원인과 해결 방안", 한국콘텐츠학회논문지, 제9권, 제5호, pp.145-155, 2009.
  18. 곽병준, 지태정, "디지털 CR시스템에서 Image plate의 화질 평가", 방사선방어학회지, 제36권, 제4호, pp.216-222, 2011.