Evaluation of Usefulness of SPECT-CT at the Examination of Digestive System Leakage Patients

소화기계 Leakage 환자 검사 시 SPECT-CT의 유용성 평가

  • Ham, Jun Cheol (Dept. of Nuclear Medicine, Yonsei University Health System) ;
  • Oh, Shin Hyun (Dept. of Nuclear Medicine, Yonsei University Health System) ;
  • Choi, Yong Hoon (Dept. of Nuclear Medicine, Yonsei University Health System) ;
  • Kang, Chun Koo (Dept. of Nuclear Medicine, Yonsei University Health System) ;
  • Kim, Jae Sam (Dept. of Nuclear Medicine, Yonsei University Health System)
  • 함준철 (연세의료원 세브란스병원 핵의학과) ;
  • 오신현 (연세의료원 세브란스병원 핵의학과) ;
  • 최용훈 (연세의료원 세브란스병원 핵의학과) ;
  • 강천구 (연세의료원 세브란스병원 핵의학과) ;
  • 김재삼 (연세의료원 세브란스병원 핵의학과)
  • Received : 2018.04.14
  • Accepted : 2018.04.30
  • Published : 2018.05.19

Abstract

Purpose When examining patients with digestive system Leakage, it is not easy to distinguish between bile leakage and bleeding only with Planar images. I would like to evaluate the utility of leakage of bile, confirmation of gastrointestinal bleeding and location discrimination using SPECT-CT. Materials and Methods SPECT-CT was performed according to the request of the reading room after acquiring Planar image for a total of 13 patients, including 8 patients suspected of bile leakage and 5 patients suspected of gastrointestinal bleeding, among patients visiting this specification went. We used Symbia T16 from SIEMENS and Discovery 670 from GE. Planar and SPECT-CT images were evaluated with a score of 1 to 10 by 4 experienced nuclear medicine doctors. Using the sensitivity and the specificity, the evaluation of the inspection by the ROC curve was carried out. The final diagnosis was confirmed by follow-up observation as a result of reoperative surgery. Results The sensitivity, specificity and accuracy of SPECT-CT were 91.7%, 100% and 94.2%, respectively. Planar images were 83.3%, 68.8% and 78.8%, respectively. Planar images showed lower diagnostic accuracy compared to SPECT-CT (78.8%, 94.2%, p<0.05). Moreover, the reliability of the diagnosis of SPECT-CT by ROC curve analysis showed a more useful result than the Planar image (p<0.05). Conclusion SPECT-CT had high sensitivity and specificity for diagnosis of biliary leakage and gastrointestinal bleeding and location discrimination. When SPECT-CT is additionally performed together with Planar images, it may be considered to improve bile leakage and diagnosis of gastrointestinal bleeding patients and position discrimination evaluation. There is usefulness depending on the patient's age and position, but consideration of additional CT exposure may be done sufficiently.

소화기계 Leakage환자 검사 시 Planar 영상만으로 담즙누출 및 출혈여부와 위치감별이 쉽지 않다. SPECT-CT를 이용하여 담즙누출 및 위장관출혈 확인과 위치 감별을 통한 유용성을 평가하고자 한다. 본원에 내원한 환자 중 담즙누출 의심 환자 8명 및 위장관출혈이 의심되는 환자 5명, 총 13명을 대상으로 Planar영상 획득 후 판독실요청에 따라 SPECT-CT를 진행했다. 장비는 SIEMENS사의 Symbia T16과 GE사의 Discovery 670을 사용했다. Planar 및 SPECT-CT 영상은 4명의 경험 있는 핵의학 의사에 의해 1~10점의 점수로 평가했다. 민감도 및 특이도를 이용하여 ROC 곡선에 의한 검사 평가를 시행했다. 최종 진단은 재수술 결과 및 추적 관찰을 통해 확인했다. SPECT-CT의 민감도, 특이도 및 정확도는 각각 91.7%, 100% 및 94.2%였다. Planar영상은 각 각 83.3%, 68.8% 및 78.8%였다. Planar영상은 SPECT-CT와 비교하여 낮은 진단 정확도를 보였다(78.8%, 94.2%, p<0.05). 또한 ROC곡선 분석에서 SPECT-CT의 진단 신뢰도는 Planar영상보다 유용한 결과를 나타냈다(p<0.05). SPECT-CT는 담즙누출 및 위장관출혈 진단과 위치 감별에 민감도와 특이도가 높게 나타났다. Planar영상과 함께 SPECT-CT를 추가로 시행한다면 담즙누출 및 위장관출혈 환자의 진단과 위치 감별평가를 향상 시킬 것으로 사료된다. SPECT-CT는 다른 장기와의 중첩으로 진단이 어려울 경우 유용성이 있지만 추가적인 CT피폭에 대한 고려는 충분히 이루어져야 할 것이다.

Keywords

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