慢性化脓性中耳炎的CT诊断

HRCT Diagnosis of Chronic Suppurative Otitis Media

目的：探讨CT在慢性化脓性中耳炎（CSOM）诊断中的应用价值。材料与方法：收集经临床、手术病理证实的CSOM49例、52耳行高分辨CT扫描，并与手术结果作对照性研究。结果：单纯型、骨疡型化脓性中耳炎多表现为中耳腔内斑片状、条索状阴影或软组织肿块，骨质破坏相对较轻，有时可见较有特征性的气液平征象；胆脂瘤多表现为上鼓室、鼓窦及乳突区的软组织肿块，骨质破坏严重，手术病理结果支持CT诊断，符合率分别为87.5％和86．4％．结论：高分辨CT对慢性化脓性中耳炎的诊断价值是肯定的。

Purpose: To evaluate the diagnostic value of HRCT in CSOM. Meterials and Method: 49 Patients(52ears) wich CSOM proved by surgeon and/or pathology were studied ich high resolution CT, and compared with the operative findings. Results: Effusion and granuloma of CSOM were patch-like. Streak like or soft tissue mass with slight bony erosion. A fluid level sign could be found sometime. Cholesteatoma of the middle ear was mass-shaped mosthy with obvious bony destrucion. The HRCT diagnosis was in accordance with surgical findings. The accuracy were 87. 5 % and 86. 4%. Couclusion. The value of HRCT in CSOM is affirmative.