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Stationary and Moving Computed Radiography Grids : Comparative Observer's Perception

Computed Radiography에서 고정형 그리드와 이동형 그리드 영상의 인식률 비교

Lee, Kiho;Lee, Changhoon;Jin, Gyehwan
이기호;이창훈;진계환

  • Received : 2015.12.07
  • Accepted : 2015.12.25
  • Published : 2015.12.31

Abstract

This study assessed the degradation of image quality caused by grid artifacts and $moir{\acute{e}}$ pattern artifacts in a stationary grid, and the degradation of image quality caused by cut off artifacts in a moving grid. X-ray images were acquired in a stationary grid and a moving grid with X-ray exposure conditions of 100 cm, 80 kVp, and 30 mA using a CDRAD phantom and a 24 cm thickness acrylic phantom. Observer's perception of X-ray imaging using CDRAD Analyzer was mean 49.36, standard deviation 3.76, maximum 55.56, and minimum 38.67 in the stationary grid, and 47.04, 12.69, 55.56, and 20.89, respectively, in the moving grid. The stationary grid was superior to the moving grid in terms of the mean and standard deviation of observer's perception.

Keywords

Stationary Grid;Moving Grid;Perception;Computed Radiography;CDRAD Phantom;CDRAD Analyzer

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Acknowledgement

Supported by : National Research Foundation of Korea(NRF)