Methods The conventional MRI was performed pre therapy in 21 patients with brain abscess in the capsule period and 25 patients with vesica astrocytomas.

• 方法:对21例包膜期脑脓肿和25例囊性星形细胞瘤治疗前行MRI扫描,分析包膜期脑脓肿暗带征的病理基础,比较两类疾病暗带征的出现率及不同形态。