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目的：探讨慢性中耳炎的ＨＲＣＴ征象、诊断及鉴别诊断。材料与方法：对手术证实的１７例慢性中耳炎患者术前进行ＨＲＣＴ扫描并与手术病理结果对照分析。结果：胆脂瘤８例表现为中耳腔内团块状影，周围低密度环包绕，听骨明显破坏及中耳窦腔扩大，骨缘硬化。４例肉芽肿多呈片状、条索状或网状，听骨破坏较轻。结论：根据中耳腔软组织影的形态及骨质破坏而非病变的密度改变，大多数慢性中耳炎患者可藉ＨＲＣＴ扫描准确诊断
Objective: To investigate the HRCT signs, diagnosis and differential diagnosis of chronic otitis media. Materials and Methods: Seventeen patients with chronic otitis media confirmed by surgery underwent preoperative HRCT scans and compared with the surgical pathology results. Results: 8 cases of cholesteatoma presented with lumpy middle shadow of the middle ear, surrounded by low density ring, obvious destruction of the ossicular cavity and enlargement of the middle ear cavity with hardening of the bone margin. 4 cases of granulomas were mostly sheet-like, cord-like or reticular, less damage to the bones. CONCLUSIONS: Most patients with chronic otitis media can be accurately diagnosed by HRCT based on the morphology of the middle ear cavity soft tissue and the non-lesioned density changes associated with bone destruction