Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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The Research on Compression Image Quality of Full Field Digital Mammography on PACS Environment

PACS환경에서 Full Field Digital Mammography 영상의 압축 화질평가에 관한 연구

  • Jeong, Jaeho (Department of Radiologic Science, Kyung Hee Medical Center) ;
  • Kim, Eunsoo (Department of Electronics, Kwangwoon University)
  • Received : 2014.04.30
  • Accepted : 2014.06.25
  • Published : 2014.06.30
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Abstract

We tried to assessment about characteristics of image through quantitative evaluation method and qualitative evaluation method in Full Field Digital Mammography. It satisfied an approval standard of ten score regardless of compression ratio measuring detection score after compressing and appling an algorithm of JPEG2000 orJPEG compression targeting ACR accreditation phantom. Also, it was apparent that when we selected and compressed the image of real fine lesion and measured a change of diagnosis ability magnifing over 50 percent after compressing over 20:1 ratio, it had a strong influence on diagnosis ability. We realized that the difference between the original image according to compression ratio measuring a quantitative evaluation which is PSNR,RMSE,MAE and SSIM was relatively allowable.

디지털 Mammography영상에서 압축률에 따른 화질의 특성에 대해 정량적 평가와 정성적평가를 실시하였다. ACR Accreditation phantom을 대상으로 JPEG2000, JPEG 압축알고리즘을 적용하여 압축한 후 Detection Score를 측정하여 압축률에 상관없이 10점 인정기준을 충족하였다. 또한 실제미세병소 영상을 선정하여 압축을 실시하여 확대율에 따른 진단능의 변화를 측정하여 20:1 이상 압축 후 50% 이상 확대 시 진단능에 영향을 미칠 수 있음을 알 수 있었다. 또한, 정량적 평가방법인 PSNR, RMSE, MAE, SSIM등을 측정하여 압축률에 따른 원본영상과의 차이점은 비교적 허용 가능한 오차범위 내의 값이 측정되었다. 또한 MTF 측정을 통해 Full Field Digital Mammography 영상의 화질이 진단에 적합한 영상임을 알 수 있었다.

Keywords

References

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