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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

Abstract

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.

Keywords

Computed Radiography;Relative Sensitivity;Relative Emission;Image Plate

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