대한방사선기술학회지:방사선기술과학 (Journal of radiological science and technology)

  • 제35권4호
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  • Pages.293-298
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  • 2012
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  • 2288-3509(pISSN)
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  • 2384-1168(eISSN)
대한방사선과학회 (Korean Society of Radiological Science)
권호 표지

디지털 유방확대촬영술에서 노출방식에 따른 피폭선량 평가

The Evaluation of Radiation Dose by Exposure Method in Digital Magnification Mammography

  • 김미영 (단국대학교병원 영상의학과) ;
  • 김화선 (안산대학교 방사선과)
  • Kim, Mi-Young (Dept. of Diagnostic Radiology, Dankook Univ. Hospital) ;
  • Kim, Hwa-Sun (Dept. of Radiologucal Technology, Ansan University)
  • 투고 : 2012.10.30
  • 심사 : 2012.12.11
  • 발행 : 2012.12.31
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초록

디지털 유방촬영술은 유방의 두께 및 유선조직의 밀도에 따라 노출조건이 자동으로 이루어지는 자동노출제어장치를 사용하고 있는데 이는 피폭선량을 증가시키는 원인이 되기도 한다. 이 연구에서는 디지털 유방확대촬영술에서 영상의 질을 유지하며 불필요한 방사선 피폭을 줄이기 위한 최적의 방사선량 촬영조건을 알아보았다. 자동노출방식을 사용할 경우 가장 좋은 영상화질을 얻을 수 있었으나 평균유선선량 역시 가장 높았다. 수동노출방식의 경우 자동노출방식의 55 % 정도의 mAs 값만으로도 기준 팬텀영상 점수와 신호대잡음비를 얻을 수 있으며 평균유선선량은 55 % 이하로 줄일 수 있었다. 위와 같은 결과를 참고로 하면 디지털 유방확대촬영 시 자동노출방식보다는 수동노출방식을 이용함으로써 불필요한 환자의 피폭선량을 줄일 수 있을 것이라 생각된다.

In digital mammography, Exposure factor were automatically chosen using by measurement breast thickness and the density of mammary gland. It may cause a increase glandular dose. The purpose of this study was to investigate optimal image quality in digital magnification mammography to decrease radiation exposure of patient dose. Auto mode gives the best image quality however, AGD showed better image quality. Image quality of manual mode passed phantom test and SNR at 55% mAs of auto mode commonly used in the digital magnification mammography. Also it could reduce AGD. According to result, manual mode may reduce the unnecessary radiation exposure in digital magnification mammography.

키워드

참고문헌

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