text: 一般脑脓肿的典型CT表现是：①脓腔呈圆形或类圆形低密度区；②脓肿壁可呈等密度或稍高密度环状影，增强扫描呈环状强化，壁厚一般5～6mm；③脓肿周围脑组织水肿，呈广泛低密度区，多表现为不规则指状或树叶状；④脓肿较大者见占位效应。
entities.entity: CT
entities.label: pro
entities.entity: 脓腔呈圆形或类圆形低密度区
entities.label: sym
entities.entity: 脓肿壁可呈等密度或稍高密度环状影
entities.label: sym
entities.entity: 增强扫描呈环状强化
entities.label: sym
entities.entity: 壁厚一般5～6mm
entities.label: sym
entities.entity: 脓肿周围脑组织水肿
entities.label: sym
entities.entity: 呈广泛低密度区
entities.label: sym
entities.entity: 不规则指状或树叶状
entities.label: sym