흉부(胸部) 경선질촬영(硬線質撮影)에 있어서 피폭선양(被曝線量)의 저감(低減)에 관(關)한 연구(硏究)

A Study on Image Quality and Exposure Dose of Hard-radiation Radiography of the Chest

  • 임태랑 (일본 화학요법연구소부속병원 방사선실) ;
  • 석전유치 (일본 화학요법연구소부속병원 방사선실) ;
  • 전전미향 (일본 화학요법연구소부속병원 방사선실) ;
  • 앵정달야 (일본 화학요법연구소부속병원 방사선실) ;
  • 김정웅 (고려대학교의료원 구로병원 방사선과) ;
  • 황종선 (중앙대학교 부속병원 방사선과)
  • Hayashi, Taro (Dept. of Radiotechnology, Institute Hospital, of Chemotherapy) ;
  • Ishida, Yuji (Dept. of Radiotechnology, Institute Hospital, of Chemotherapy) ;
  • Maeda, Mika (Dept. of Radiotechnology, Institute Hospital, of Chemotherapy) ;
  • Sakurai, Tatsuya (Dept. of Radiotechnology, Institute Hospital, of Chemotherapy) ;
  • Kim, Chung-Woon (Dept. of Radioloa.y, Guro Hospital, Korea University Medical Center) ;
  • Hwang, Jong-Sun (Dept. of Radiology, Chung Ang University Hospital)
  • 발행 : 1991.12.20

초록

Experiment was conducted on the image quality and exposure dose following replacement of $CaWO_4$ system screen BH-III and BX-III which have so far been used for high-voltage hard-radiation quality radiography, with rare earth system screen KO750, combined with high contrast film SRH, while additional filter was altered, Cu 0.8 mm+Al 1.4 mm(HVL : Al 8.8 mm), Cu 1.3 mm+Al 1.0 mm(HVL : Al 10.6 mm) and Cu 1.8 mm+Al 1.5 mm(HVL : Al 11.4 mm). AS a result, visual evaluation did not detect extreme changes in image quality under the respective condition(HVL : $Al\;8.8\;mm{\sim}Al\;11.4\;mm$). It was noted, however, that surface exposure dose declined with an increase in the thickness of the additional filter, as it was $18.9\;{\mu}Gy$ at HVL Al 8.8 mm, $17.5\;{\mu}Gy$ at Al 10.6 mm and $15.7\;{\mu}Gy$ at Al 11.4 mm. Considering the limited rating of X-ray equipment and wear of machinery, however, the range of $Cu\;1.3\;mm{\sim}1.8\;mm+Al\;1.0\;mm{\sim}1.5\;mm(1/16\;VL{\sim}1/32\;VL)$ seemed to be a limit.

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