The Korean Journal of Nuclear Medicine (대한핵의학회지)

The Korean Society of Nuclear Medicine (대한핵의학회)
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Comparison of rCBF between Patients with Medial Temporal Lobe Epilepsy and Normal Controls using ${H_2}^{15}O\;PET$

내측 측두엽 간질환자와 정상인의 ${H_2}^{15}O\;PET$을 이용한 뇌 혈류량 비교

  • Kang, Eun-Joo (College of Medicine, Institute of Radiation Medicines, Seoul National University) ;
  • Lee, Jae-Sung (Department of Nuclear Medicine, Seoul National University) ;
  • Nam, Hyun-Woo (Department of Neurology Medicine, Seoul National University) ;
  • Lee, Sang-Kun (Department of Neurology Medicine, Seoul National University) ;
  • Lee, Dong-Soo (Department of Nuclear Medicine, Seoul National University) ;
  • Chung, June-Key (Department of Nuclear Medicine, Seoul National University) ;
  • Lee, Myung-Chul (Department of Nuclear Medicine, Seoul National University)
  • 강은주 (서울대학교 의과대학 방사선의학연구소) ;
  • 이재성 (서울대학교 의과대학 핵의학과) ;
  • 남현우 (서울대학교 의과대학 신경과) ;
  • 이상건 (서울대학교 의과대학 신경과) ;
  • 이동수 (서울대학교 의과대학 핵의학과) ;
  • 정준기 (서울대학교 의과대학 핵의학과) ;
  • 이명철 (서울대학교 의과대학 핵의학과)
  • Published : 2002.06.30
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Abstract

Purpose: The aim of this study was to identify the brain areas whose regional cerebral blood flow (rCBF) was changed in medial temporal lobe epilepsy (mTLE) using ${H_2}^{15}O-PET$. Materials and Methods: 12 patients with mTLE (6 left, 6 right mTLE) and 6 normal controls were scanned during a fixation baseline period and a sensory-motor condition where subjects pressed a button to an upward arrow. A voxel-based analysis using SPM99 software was peformed to compare the patient groups with the normal controls for the rCBF during fixation baseline period and for relative changes of rCBF during the sensory-motor task relative to fixation. Results: During the fixation baseline, a significant reduction of rCBF was found posterior insula bilaterally and right frontopolar regions in right mTLE patients compared to the normal controls. In left mTLE patients, the reduction was found in left frontopolar and temporal legions. During the sensory-motor task, rCBF increase over the fixation period, was reduced in left frontal and superior temporal legions in the right mTLE patients whereas in various areas of right hemisphere in left mTLE patients, relative to normal controls. However, the increased rCBF was also found in the left inferior parietal and anterior thalamic/fornix regions in both right and left mTLE patients compared to normal controls. Conclusion: Epilepsy induced changes were found not only in relative increase/decrease of rCBF during a simple sensory-motor control condition relative to a fixation rest condition but also in the relative rCBF distribution during the rest period.

목적: 본 연구는 내측 측두엽 간질 환자가 국소 혈류 변화를 보이는 두뇌 영역을 ${H_2}^{15}O-PET$을 이용하여 확인하는 것을 목적으로 하였다. 대상 및 방법: 12명의 내측두엽간질 환자(우측 6명, 좌측 6명)와 6명의 정상인에게 '+' 응시 조건과, 위로 향한 화살표에만 단추를 눌러 반응하는 감각-운동 과제를 수행하면서 ${H_2}\;^{15}O-PET$을 실시하였다. 각 스캔의 영상과 SPM99 소프트웨어를 이용하여 화소 분석방법으로 정상인과 환자 집단 사이에 기저 뇌혈류 또는 뇌혈류 증가 정도의 차이를 조사하였다. 결과: 응시기저 조건 중에는 우 내측두엽 간질 환자는 좌우 양반구의 후측 도와 오른쪽 전두말단 부분의 혈류가 감소하였다. 같은 조건에서, 좌 내측두엽 간질 환자에서는 왼쪽 전두말단 영역과 측두엽 영역의 혈류가 정상인들보다 감소되었다. 응시조건과 비교하여 감각-운동 과제 중에 혈류가 증가하는 정도를 정상인과 비교하였을 때 우 내측두엽 간질 환자에게서는 왼쪽의 전두엽과 상측두 영역이, 좌 내측두엽 간질 환자들에게서는 우반구의 여러 영역이 저하되었다. 반면 두 환자 집단 모두 왼쪽의 하 두정엽과 전시상핵/뇌궁 연접 영역의 혈류 증가 정도가 정상인 집단에 비하여 증가되었다. 결론: ${H_2}\;^{15}O-PET$으로 측정된 두뇌 국소 혈류 분포를 SPM99을 이용하여 분석함으로써, 단순한 감각 운동 조건 동안의 두뇌 국소 혈류 증가 양상은 물론이고, 응시점을 주시하는 단순 기저 조건 중 측정된 두뇌의 국소 혈류량의 분포에도 내측 간질 환자 집단과 정상인 집단간에 유의미한 차이가 있음이 발견되었다.

Keywords

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