Investigative Magnetic Resonance Imaging

Korean Society of Magnetic Resonance in Medicine (대한자기공명의과학회)
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Enhancement Pattern of the Normal Facial Nerve on Three - Dimensional (3D) - Fluid Attenuated Inversion Recovery (FLAIR) Sequence at 3.0 T MR Units

3.0T 자기공명영상기기에서 시행한 3D-FLAIR 영상에서의 정상 안면신경의 조영증강 양상

  • Hyun, Dong-Ho (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Lim, Hyun-Kyung (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Park, Jee-Won (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Kim, Jong-Lim (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Lee, Ha-Young (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Park, Soon-Chan (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Ahn, Joong-Ho (Department of Otolaryngology (J.H.A.), University of Ulsan College of Medicine, Asan Medical Center) ;
  • Baek, Jung-Hwan (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Choi, Choong-Gon (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center) ;
  • Lee, Jeong-Hyun (Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan edical Center)
  • 현동호 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 임현경 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 박지원 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 김종림 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 이하영 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 박순찬 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 안중호 (울산대학교 의과대학 서울아산병원 이비인후과학교실) ;
  • 백정환 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 최충곤 (울산대학교 의과대학 서울아산병원 영상의학과학교실) ;
  • 이정현 (울산대학교 의과대학 서울아산병원 영상의학과학교실)
  • Received : 2011.11.07
  • Accepted : 2011.12.27
  • Published : 2012.04.30
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Abstract

Purpose : To compare the enhancement pattern of normal facial nerves on 3D-FLAIR and 3D-T1-FFE-F) sequences at 3.0 T MR units. Materials and Methods: We assessed 20 consecutive subjects without a history of facial nerve abnormalities who underwent temporal bone MRI with contrast enhancement between January 2008 and March 2009. Two neuroradiologists independently reviewed pre-/post-enhanced 3D-T1-FFE-FS and 3D-FLAIR images respectively with 2-week interval to assess the enhancement of normal facial nerves divided into five anatomical segments. The degree of enhancement in each segment was graded as none, mild or strong, and the results of 3D-FLAIR and 3D-T1-FFE-FS image sets were compared. Results: On 3D-FLAIR images, one of the two reviewers observed mild enhancement of the genu segment in two (10%) subjects. On 3D-T1-FFE-FS images, at least one segment of the facial nerve was enhanced in 13 (65%) subjects. At least one reviewer found that 17 of the 100 segments showed enhancement on 3D-T1-FFE-FS images, with the mastoid segment being the most commonly enhanced. Interobserver agreement on 3D-T1-FFE-FS images was good for enhancement of the normal facial nerve (${\kappa}$= 0.589). Conclusion: In contrast to 3D-T1-FFE-FS, normal facial nerve segments rarely showed enhancement on 3D-FLAIR images.

목적: 3-T 자기공명영상장치에서 시행한 3D-FLAIR 및 3D-T1-FFE-FS영상에서의 정상안면신경의 조영증강 양상의 비교가 그 목적이다. 대상과 방법: 측두골 자기공명영상을 촬영한 환자 중 안면신경이상의 과거력이 없는 20명의 환자를 대상으로 하였다. 두 명의 영상의학전문의가 정상안면신경의 조영증강을 평가하기 위해 조영증강 전후의 3D-T1-FFE-FS영상과 3D-FLAIR영상을 2주 간격으로 독립적으로 분석하였다. 안면신경은 5개의 분절로 나누었고 조영증강의 정도는 없거나 약하게 혹은 강하게 되는 경우로 나누어 분석하였다. 결과: 3D-FLAIR영상에서 한 명의 평가자가 두 예의 안면신경 슬부에 약한 조영증강이 있다고 보았다. 3D-T1-FFE-FS영상에서는 13예의 안면신경에서 최소 한 분절 이상 조영증강이 있다고 하였고, 최소 한 명의 평가자가 안면신경의 총 100개 분절 중 17개의 분절에서 조영증강이 있다고 분석하였으며, 유양분절의 빈도가 가장 높았다. 3D-T1-FFE-FS영상에서 정상안면신경의 조영증강에 대한 평가자간의 일치도는 ${\kappa}$값 0.589로 우수하였다. 결론: 3D-T1-FFE-FS영상과 달리 3D-FLAIR영상에서 정상안면신경은 거의 조영증강되지 않는다.

Keywords

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