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Effects of Radiation Dose and Image Quality at the Coronary Angiography

관상동맥검사에서 선량과 화질에 관한 연구

  • 류명송 (동신대학교 방사선학과) ;
  • 최남길 (동신대학교 방사선학과) ;
  • 한재복 (동신대학교 방사선학과) ;
  • 양숙 (동신대학교 방사선학과) ;
  • 이종호 (화순전남대학교병원 영상의학과)
  • Received : 2012.02.16
  • Accepted : 2012.03.27
  • Published : 2012.04.28

Abstract

The aim of this study was to assess the effect of exposure factors such as kVp and mA applied by BMI on the image quality and patients absorbed dose of Coronary angiography in CT. Each data sets were into 4groups with different exposure values : Group A at 100kVp, 240mAs, Group B at 120kVp, 240mAs, Group C at 100kVp, 270mAs and Group D at 120kVp, 270mAs, and the mean of the scores of 4 groups was calculated for image quality as 4grades that is, 1(poor), 2(fair), 3(good) and 4(very good). Patient absorbed dose was calculated as DLP on the monitor. In case of absorbed dose, deviation in 2groups at 100kVp was 5.6 $mGy{\cdot}cm$, 11 $mGy{\cdot}cm$, was at 120kVp(DLP) with p<0.05. There was rather difference between groups with 100kVp or 120kVp respectively but the gaps were very little. No significant correlation was found between exposure factors and image quality in any images assessed(p>0.05), and the image quality was sufficient for diagnosis. As we applying coronary angiography, the selection of adequate exposure factors considering BMI identified might be effective for reduction of patient absorbed dose, improvement of image quality and diagnostic accuracy.

Keywords

Dose Length Product;Coronary Angiography;Body Mass Index

Acknowledgement

Supported by : 동신대학교

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