Journal of the Korean Society of Radiology (대한영상의학회지)

The Korean Society of Radiology (대한영상의학회)
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Comparison of Radiation Dose and Image Quality between the 2nd Generation and 3rd Generation DualSource Single-Energy and Dual-Source Dual-Energy CT of the Abdomen

2세대와 3세대 이중 소스 단일 에너지와 이중 소스 이중 에너지를 이용한 복부 컴퓨터단층촬영의 방사선량 및 영상 품질 비교

  • Chang Gun Kim (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hosptial) ;
  • See Hyung Kim (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Seung Hyun Cho (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hosptial) ;
  • Hun kyu Ryeom (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Won Hwa Kim (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hosptial) ;
  • Hye Jung Kim (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hosptial)
  • 김창건 (경북대학교 의과대학 칠곡경북대학교병원 영상의학과) ;
  • 김시형 (경북대학교 의과대학 경북대학교병원 영상의학과) ;
  • 조승현 (경북대학교 의과대학 칠곡경북대학교병원 영상의학과) ;
  • 염현규 (경북대학교 의과대학 경북대학교병원 영상의학과) ;
  • 김원화 (경북대학교 의과대학 칠곡경북대학교병원 영상의학과) ;
  • 김혜정 (경북대학교 의과대학 칠곡경북대학교병원 영상의학과)
  • Received : 2021.06.01
  • Accepted : 2021.09.04
  • Published : 2022.11.01
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Abstract

Purpose We compared the radiation dose and image quality between the 2nd generation and the 3rd generation dual-source single-energy (DSSE) and dual-source dual-energy (DSDE) CT of the abdomen. Materials and Methods We included patients undergoing follow-up abdominal CT after partial or radical nephrectomy in the first 10 months of 2019 (2nd generation DS CT) and the first 10 months of 2020 (3rd generation DS CT). We divided the 320 patients into 4 groups (A, 2nd generation DSSE CT; B, 2nd generation DSDE CT; C, 3rd generation DSSE CT; and D, 3rd generation DSDE CT) (n = 80 each) matched by sex and body mass index. Radiation dose and image quality (objective and subjective qualities) were compared between the groups. Results The mean size-specific dose estimation of 3rd generation DSDE CT group was significantly lower than that of the 2nd generation DSSE CT (42.5%, p = 0.013) and 2nd generation DSDE CT (46.9%, p = 0.015) groups. Interobserver agreement was excellent for the overall image quality (intraclass correlation coefficient [ICC]: 0.8867) and image artifacts (ICC: 0.9423). Conclusion Our results showed a considerable reduction in the radiation dose while maintaining high image quality with 3rd generation DSDE CT as compared to the 2nd generation DSDE CT and 2nd generation DSSE CT.

목적 2세대 및 3세대 이중 소스 단일 에너지와 이중 소스 이중 에너지를 이용한 복부 CT의 방사선량과 영상 품질을 비교하였다. 대상과 방법 부분 또는 근치적 신절제술 후 2019년 첫 10개월(2세대 이중 소스 CT)과 2020년 첫 10개월(3세대 이중 소스 CT)에 추적관찰 복부 CT를 시행한 환자들을 대상으로 하였다. 총 320명의 환자를 성별과 체질량지수에 따라 각각 80명씩 4개 그룹으로 나누었다(A, 2세대 이중 소스 단일 에너지 CT; B, 2세대 이중 소스 이중 에너지 CT; C, 3세대 이중 소스 단일 에너지 CT 및 D, 3세대 이중 소스 이중 에너지 CT). 각 그룹 간 방사선량과 영상 품질(객관적, 주관적 품질)을 비교하였다. 결과 3세대 이중 소스 이중 에너지 CT의 평균 신체 크기 특이적 선량 추정값은 2세대 이중 소스 단일 에너지 CT (42.5%, p = 0.013)와 2세대 이중 소스 이중 에너지 CT (46.9%, p = 0.015) 보다 의미 있게 낮았다. 관찰자 간 일치는 전반적인 영상 품질(intraclass correlation coefficient [이하 ICC]: 0.8867) 및 인공물(ICC: 0.9423)에서 높은 일치도를 보였다. 결론 3세대 이중 소스 이중 에너지 CT는 2세대 이중 소스 이중 에너지 CT 및 이중 소스 단일 에너지 CT와 비교하여 높은 영상 품질을 유지하면서 방사선량을 상당히 감소시킨 결과를 보여주었다.

Keywords

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