Radiation dose and Lifetime Attributable Risk of Cancer Estimates in 64-slice Multidetector Computed Tomography

64-절편 다행검출 CT 검사에서의 환자선량과 암 발생의 Lifetime Attributable Risk(LAR) 평가

  • 강영한 (대구가톨릭대학교병원 영상의학과) ;
  • 박종삼 (대구보건대학 방사선과)
  • Received : 2010.11.02
  • Accepted : 2011.03.29
  • Published : 2011.04.28


This study was to estimate the radiation dose associated with 64-slice multidetector CT(MDCT) in clinical practice and quantify the potential cancer risk associated with these examinations. Lifetime attributable risks(LAR) were estimated with models developed in the national Academies' Biological Effects of Ionizing Radiation VII report. Mean effective dose were 1.48mSv in Brain axial scan, 7.66mSv in chest routine contrast, 12.17mSv in coronary angiogram, 24.52mSv in Dynamic abdomen scan. LAR estimates for brain routine varied from 1 in 7463 for man to 1 in 4926 for women. In chest routine with contrast, LAR varied from 1 in 1449 for men to 1 in 952. LAR of Abdomen dynamic CT varied from 1 in 453 for men to 1 in 298 for women. So, 64-slice MDCT scan is associated with non-negligible LAR of cancer. Doses can be reduced by careful attention to scanning protocol.


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