Study for Reliability of Interpretation of the Three Phase Bone Scintigraphy in Patients with Post-traumatic Complex Regional Pain Syndrome

외상 후 복합부위통증증후군 환자에서 시행한 삼상 뼈 스캔의 판독 신뢰도에 관한 연구

  • Park, Jung-Mi (Department of Nuclear Medicine, Bucheon Hospital Soonchunhyang University College of Medicine) ;
  • Kim, Seon-Jung (Department of Nuclear Medicine, National Health Insurance Corporation Ilsan Hospital) ;
  • Chung, Seung-Hyun (Department of Rehabilitation Medicine, National Cancer Center) ;
  • Lee, Yong-Taek (Department of Rehabilitation Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine)
  • 박정미 (순천향대학교 부천병원 핵의학과) ;
  • 김선정 (일산보험공단병원 핵의학과) ;
  • 정승현 (국립암센터 재활의학과) ;
  • 이용택 (성균관의과대학교 강북삼성병원 재활의학과)
  • Published : 2008.02.29

Abstract

Purpose: We performed this study to evaluate reliability on interpretation of three phase bone scintigraphy (TPBS) in patients with post-traumatic complex regional pain syndrome (PT-CRPS). Methods: Based on International Association for the Study of Pain guideline in 1994, 34 patients with PT-CRPS were selected for this study. Two nuclear medicine physicians evaluated identical TPBS according to the uptake pattern, extent and intensity of the lesion, and their agreements (kappa values) were analysed. The final diagnosis based on arbitrary criteria of each physician were compared with those obtained by the criteria for PT-CRPS established in this study, which are hyperactivity on all phases (criteria 1), hyperactivity of whole joints on delayed phase (criteria 2), and hyperactivity of either whole or FDGal joints on delayed phase (criteria 3). Results: Intra-observer agreements were good for uptake pattern, intensity, and extent on TPBS. Inter-observer agreements were also good, except extent on blood pool phase (0.55). The inter-observer agreements on final diagnosis improved when criteria 1-3 were applied (0.77-0.88), compared to when physician's own criteria were used (0.63). Those also improved from 0.29 to 0.47-0.82 for acute stage, and from 0.37 to 1.0 for chronic stage. The sensitivities of chronic stage were relatively lower to those of acute stage. Conclusions: Inter-observer's variations in diagnosis of the patients with PT-CRPS using TPBS were observed. These results were attributed to different criteria set by observers. In order to improve agreement on interpretation of TPBS, common positive criteria should be established, especially considering uptake pattern and clinical stages.

목적: 외상 후 복합부위통증증후군으로 진단된 환자에서 시행한 삼상 뼈 스캔의 판독 신뢰도를 평가하기 위하여 판독 일치도를 조사하였다. 대상 및 방법: 1994년 국제통증연구학회(IASP) 기준에 따라 외상 후 복합부위통증증후군으로 진단된 34명을 대상으로 하였다. 두 명의 핵의학 전문의가 삼상 뼈 스캔의 세부영상에서 섭취의 양상, 정도와 범위를 평가하여 관찰자내 와 관찰자간 일치도(kappa value)를 구하였다. 환측 사지 전체의 관류와 섭취가 증가되었을 때(기준 1), 지연영상에서 전체적으로 증가되었을 때(기준2), 국소이상의 섭취가 증가되었을 때(기준3)를 양성으로 판정하는 기준에 따라 재분류하여 판독자 임의로 분류하였을 때와 최종판독 일치도를 비교하였다. 결과: 세 영상에서 섭취 양상, 정도, 범위에 대한 관찰자내 일치도는 우수하였다. 세부 영상에 대한 관찰자간 일치도(0.64-0.90)에 비하여 혈액풀의 섭취 범위에 대한 일치도는 낮았다(0.55). 관찰자간 일치도는 임의의 기준으로 최종 판정하였을 때(0.63)에 비하여 공통의 양성 판정 기준에 따라 다시 분류하였을 때 약간 향상되었다(0.77-0.88). 임상시기별 임의 기준으로 분류한 관찰자간 일치도는(급성: 0.29, 만성: 0.37) 양성 판정 기준을 적용시에 크게 향상되었다(급성: 0.47-0.82, 만성: 1.0). 임상시기별 예민도는 급성에 비해 만성에서 대체적으로 낮았다. 결론: 본 연구에서 외상 후 복합부위통증증후군 환자에서 시행한 삼상 뼈 스캔의 판독 시 관찰자간 변동성이 있는 것이 검증되었다. 그 변동성은 양성 평가의 기준이 관찰자마다 다른데서 기인하였다. 외상 후 복합통증증후군 환자에서 삼상 뼈 스캔의 판독 신뢰도를 높이기 위해서는 세부 영상 및 임상시기에 따른 구체적인 양성 판정 기준을 정할 필요가 있다.

Keywords

References

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