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I.はじめに
"もやもや"病はその印象的な症状,血管造影像でよく知られており関心の深い疾患ではあるが,多くの研究調査にもかかわらず,その原因についてはいまだ不明であり,かつ治療法についても議論の多いところである.特に外科治療に関しては脳血流を何らかの方法で増加させることに主眼が置かれているのが昨今である.したがって"もやもや"病の脳循環・代謝の解明は必要不可欠である.測定技術の発達とともに三次元的な循環測定が行えるようになり,当施設でもポジトロンCT(PET)を用いて検討した.本報告では小児・虚血発作型に対象をしぼった.
Regional (r) CBF, rOEF, rCMR02, rCBV in five cases of "moyamoya" disease in children were studied with PET scan, using 15O steady-state methods. All cases showed ischemic symptoms such as TIA, RIND and minor stroke. Intervals from the latest ictus to PET ranged from 3 days to 3 years 6 months. Control data were obtained through PET studies in 8 normal volunteers.
Physiological parameters described above, in cerebral gray matter, white matter and basal ganglia were calculated and were carefully compared with normal control. Apparently low density area in X-ray CT were excluded from this analysis.
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