モヤモヤ病の磁気共鳴画像

Magnetic Resonance Imaging in Moyamoya Disease

I．はじめに

　モヤモヤ病は日本人にみられる稀な疾患であると考えられていたが^6,8,10,11），現在では日本以外からも多数の報告があり^7,9,14,15），本症の成因についての究明が待たれている．われわれはモヤモヤ病における脳虚血巣の特徴およびその予後を把握する目的でモヤモヤ病患者のMR—CT所見をX線CT所見と対比しながら検討した結果，モヤモヤ病の虚血巣の特徴について興味ある知見を得たので報告する．

Ten patients, seven children and three adults, with "moyamoya" disease were examined by MR-CT. MRI findings in these patients were compared with X-ray Cl findings to study the features of the ische-mic lesions in "moyamoya" disease and the following results were obtained.

1) Old cerebral infarct, cortical atrophy and in-tracerebral hematoma in "moyamoya" disease were better delineated by image of the spin echo method. 2) It is possible to differentiate the ischemic lesions such as ischemic edema, or acute or chronic cerebral infarct by calculating the T₁ and T₂ value from the T₁ and T₂ image.