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Brain Abscess Satoshi UMEDA 1 , Akira FUJIKAWA 1 , Kazuhiro TSUCHIYA 2 1Department of Radiology, Self-Defence Forces Central Hospital 2Department of Radiology, Saitama Medical Center Keyword: 脳膿瘍 , 拡散強調像 , DWI , 磁化率強調像 , SWI , 核磁気共鳴スペクトロスコピー , MRS , brain abscess , diffusion-weighted imaging , susceptibility-weighted imaging , magnetic resonance spectroscopy pp.368-374
Published Date 2021/3/10
DOI https://doi.org/10.11477/mf.1436204400
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 Although the prognosis of brain abscesses has historically improved, the mortality rate still ranges from 5 to 32%, with ventricular perforation reaching 50% and 85-100% in fungal brain abscesses. The characteristic finding of ring-like enhancement by contrast-enhanced imaging is non-specific, and DWI, SWI and MR spectroscopy are very useful in differentiating brain abcesses from necrotizing brain tumors. Brain abscesses show apparent diffusion restriction on the DWI/apparent diffusion coefficient(ADC) map, whereas necrotizing brain tumors often show a weak diffusion restriction. The “dual rim sign” on SWI is also a highly specific finding of brain abscess.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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