耳部结构大部分深藏于颞骨之内，结构复杂且细小，其发病时临床症状和体征多无特殊性，影像学检查具有决定性意义，常可以显示病变的具体部位、范围和形态，为诊断和鉴别诊断提供重要依据。普通X光片和体层作为常规检查，对中耳、乳突炎症和胆脂瘤的诊断虽有一定帮助，但不能适 Most of the structure of the ear deep within the temporal bone, the structure is complex and small, the onset of clinical symptoms and signs are more specific, imaging examination has a decisive significance, often can display the specific location of the lesion, the scope and morphology for the diagnosis And differential diagnosis provide an important basis. General X-ray and body layer as a routine examination of the middle ear, mastoid inflammation and cholesteatoma diagnosis may have some help, but not suitable