Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Evaluation of Image Quality according to Insert Position and Thickness Change by Fabricating Modified ACR Phantom in Mammography

유방엑스선검사에서의 변형된 ACR 팬텀 제작을 통한 모조병소의 위치와 두께 변화에 따른 영상의 품질 평가

  • Uhm, Hyon-Ja (Department of Radiological Science, Graduate School of Public Health and Social Welfare, Jeonju University) ;
  • Park, Chanrok (Department of Radiological Science, Graduate School of Public Health and Social Welfare, Jeonju University)
  • 엄현자 (전주대학교 보건복지대학원 방사선학과) ;
  • 박찬록 (전주대학교 보건복지대학원 방사선학과)
  • Received : 2022.02.22
  • Accepted : 2022.03.20
  • Published : 2022.04.30
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Abstract

To maintain improved image quality in mammography, the quality control process is performed using the ACR (American college of radiology) phantom. In addition, many studied were performed by fabricating the customized breast phantom to provide more information in mammography. Thus, the purpose of this study was to evaluate the image quality by designing the modified ACR phantoms. The five modified acrlylic ACR phantoms were designed by considering insert position and phantom thickness. The phantoms were consisted of 4.5, 3.0, and 1.5 cm in terms of phantom thickness, and 3.0, 2.0, and 0.5 cm in terms of insert position, respectively. The acquired images were evaluated by PSNR (peak signal to noise ratio), RMSE (root mean square error), CC (correlation coefficient), CNR (contrast to noise ratio), and COV (coefficient of variation). Based on the similarity analysis, the result is suitable between conventional and new designed phantoms. In addition, the CNR and COV results in terms of insert position showed that image quality for 0.5 cm was 2.3 and 27.4% improved compared with 2 and 3 cm, respectively. According to phantom thickness results, the CNR result for 1.5 cm and COV result for 4.5 cm were 50.1 and 62.7% improved compared with that those conditions. In conclusion, we confirmed that the image quality depends on the breast size and thickness through modified ACR phantom study.

Keywords

References

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