Objective To clarify the CT criteria for encephalitic stage and enveloped stage of brain abscess.

目的明确脑脓肿脑炎膜CT分标准。

Results The encephalitic stage was characterized by prominent perivascular cuffing.In enveloped stage, five distinct histological zones were seen.

果脑炎以“血套"为镜下特征，膜表现为5个独特的组织学区带。