대한영상의학회지 (Journal of the Korean Society of Radiology)

  • 제84권1호
  • /
  • Pages.170-184
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  • 2023
  • /
  • 1738-2637(pISSN)
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  • 2288-2928(eISSN)
대한영상의학회 (The Korean Society of Radiology)
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간의 단일선원 Twin Beam과 이중선원 이중에너지 전산화단층촬영의 비조영증강 영상과 가상 비조영증강 영상의 비교 연구

Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT

  • 이정섭 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 최국명 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 김봉수 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 고수연 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 이경렬 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 김정재 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 김두리 (제주대학교 의과대학 제주대학교병원 영상의학과)
  • Jeong Sub Lee (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Guk Myung Choi (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Bong Soo Kim (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Su Yeon Ko (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Kyung Ryeol Lee (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Jeong Jae Kim (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Doo Ri Kim (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine)
  • 투고 : 2021.12.13
  • 심사 : 2022.05.02
  • 발행 : 2023.01.01
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⟨ 이전 논문 다음 논문 ⟩

초록

목적 Twin beam dual-energy CT (이하 tbDECT)와 dual source DECT (이하 dsDECT)를 통해 얻은 true non-contrast image (이하 TNC)와 virtual non-contrast image (이하 VNC)의 attenuation values 차이를 평가해 보고자 한다. 대상과 방법 간 DECT를 촬영한 62명의 환자를 대상으로 하였다(tbDECT, 32명; dsDECT, 30명). TNC와 재구성한 arterial VNC (이하 AVNC), portal VNC (이하 PVNC), delayed VNC (이하 DVNC)에서 복부내 11개 장기에 대해 attenuation values를 측정하여 비교하였다. 또한 TNC와 VNC attenuation values의 절대오차가 10 Hounsfield units (이하 HU) 이하인 비율을 구하였다. 결과 TNC와 VNC의 평균 attenuation values 비교에서 각 DECT별 33개의 항목(3시기 VNC, 11개 장기) 중 tbDECT는 17개, dsDECT 19개 항목에서 유의한 차이를 보였다(Bonferroni correction p < 0.0167). 절대오차 10 HU이하인 비율은 tbDECT의 AVNC, PVNC, DVNC에서 각각 56.7%, 69.2%, 78.6%, dsDECT는 각각 70.5%, 78%, 78%이었고, 두 DECT모두 AVNC에서 가장 낮았다. 결론 두 DECT의 VNC는 적지 않은 attenuation values 차이로 TNC를 대체하기에는 충분하지 않다.

Purpose To assess the magnitude of differences between attenuation values of the true non-contrast image (TNC) and virtual non-contrast image (VNC) derived from twin-beam dual-energy CT (tbDECT) and dual-source DECT (dsDECT). Materials and Methods This retrospective study included 62 patients who underwent liver dynamic DECT with tbDECT (n = 32) or dsDECT (n = 30). Arterial VNC (AVNC), portal VNC (PVNC), and delayed VNC (DVNC) were reconstructed using multiphasic DECT. Attenuation values of multiple intra-abdominal organs (n = 11) on TNCs were subsequently compared to those on multiphasic VNCs. Further, we investigated the percentage of cases with an absolute difference between TNC and VNC of ≤ 10 Hounsfield units (HU). Results For the mean attenuation values of TNC and VNC, 33 items for each DECT were compared according to the multiphasic VNCs and organs. More than half of the comparison items for each DECT showed significant differences (tbDECT 17/33; dsDECT 19/33; Bonferroni correction p < 0.0167). The percentage of cases with an absolute difference ≤ 10 HU was 56.7%, 69.2%, and 78.6% in AVNC, PVNC, and DVNC in tbDECT, respectively, and 70.5%, 78%, and 78% in dsDECT, respectively. Conclusion VNCs derived from the two DECTs were insufficient to replace TNCs because of the considerable difference in attenuation values.

키워드

과제정보

This work was supported by a research grant from Jeju National University Hospital in 2017 (No. 2017-24).

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