The Korean Journal of Nuclear Medicine Technology (핵의학기술)

The Korean Society of Nuclear Medicine Technology (대한핵의학기술학회)
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A Study on the Reduction of Kidney Uptake of 18F-FDG due to the Water Intake at the Time of Additional Examination in the PET/CT scan

PET/CT 검사에서 추가 검사 시 수분섭취에 따른 18F-FDG의 신장 섭취 감소에 대한 고찰

  • Lee, Yi Lang (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System) ;
  • Kim, Sang Gyu (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System) ;
  • Ham, Jun Chul (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System) ;
  • Nam-Koong, Hyuk (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System) ;
  • Lim, Han Sang (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System) ;
  • Kim, Jae Sam (Department of Nuclear Medicine, Severance Hospital, Yonsei University Health System)
  • 이이랑 (연세의료원 세브란스병원 핵의학과) ;
  • 김상규 (연세의료원 세브란스병원 핵의학과) ;
  • 함준철 (연세의료원 세브란스병원 핵의학과) ;
  • 남궁혁 (연세의료원 세브란스병원 핵의학과) ;
  • 임한상 (연세의료원 세브란스병원 핵의학과) ;
  • 김재삼 (연세의료원 세브란스병원 핵의학과)
  • Received : 2016.03.18
  • Accepted : 2016.04.15
  • Published : 2016.05.21
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Abstract

Purpose By ingestion of 18F-FDG of kidney of PET/CT during the inspection, if additional examination is required, depending on whether you want to water intake, we want to confirm a change in the rate of decrease of F-18 FDG of the kidney. Materials and Methods The 80 patients without kidney disease were performed PET/CT examination. Device was analyzed after setting the kidney to a three-dimensional region of interest. In patients require additional examination, and inspection after 30 minutes, a PET/CT torso examination after the water of the 500 cc ingested at a time. After the addition of both water intake group and no hydration group of kidney of SUV, it was compared with PET/CT torso scan. Results High and low of the kidney SUV did not show a significant difference in the rate of decrease. Reduction rates of background (BKG) of additional examination was 2.8% and reduction rates of SUV was 49.7% (Hydration) : -6.8% (No hydration), so did show a significant difference. In the image blind test, the average point score of hydration and no hydration was 34.25 : 17.25. Conclusion An undercurrent of 18F-FDG in the kidney at the time of torso examination, it was confirmed that the reduction rate after the addition of water intake is high. It is considered that can be expected to improve the quality of an image due to a decrease in elongation through the kidneys examination with additional fluid intake as needed intake.

FDG를 이용한 PET/CT 검사에서 FDG의 대부분이 비뇨기계를 통해 배설된다. FDG가 신장에 저류될 경우 판독 성능이 저하된다. PET-CT 검사에서 FDG의 신장 저류로 인해 추가 검사가 필요한 경우 이뇨제 사용 없이 쉬운 방법인 수분 섭취를 이용해 배설을 촉진할 수 있는 방법을 선택하는 데 도움을 주고자 한다. 11개월간 세브란스병원에서 PET-CT 검사를 시행한 환자 중 신장에 질환이 없고 기능이 정상인 환자 총 80명을 대상으로 하였다. 두 집단으로 구분하였고, 각 40명씩 구성하였다. (1) Torso 검사가 끝난 후 수분 섭취 없이 30분 동안 휴식만 취한 집단, (2) 30분 전 물 500 cc를 한 번에 섭취한 후 휴식을 취한 집단으로 나눴다. 영상분석은 SUV 측정과 Blind test, 두 가지로 하였다. SUV 측정은 양쪽 신장의 SUVmax와 근육과 지방의 SUVmax을 VOI 를 설정하여 측정하였고 간의 SUVmean을 ROI를 설정하여 측정하였다. 검증 후에 p < 0.05 인 경우를 통계적으로 유의하다고 판단하였다. Blind test는 Torso 검사와 추가 검사의 영상을 비교하여 신장 방사능 배설정도를 4등급으로 점수를 나타내어 분류 및 기록하였다. SUV 측정 결과 수분 미섭취 군의 신장 SUV 값은 6.8% 증가하였고, 수분 섭취 군의 SUV의 값은 49.7% 감소하였다(p < 0.001). Blind test에서 수분 미섭취 군의 평균은 17.25점이었고, 수분섭취 군의 평균은 34.75점으로 더 높은 점수를 나타냈다.

Keywords

References

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