慢性中耳炎的CT诊断

The Computer Tomography Diagnosis for Patients with Chronic Middle Ear

目的:探讨CT对慢性中耳炎的诊断价值。方法:回顾性分析经手术病理确诊的慢性中耳炎45例的CT表现特点。结果:14例胆脂瘤型中耳炎CT表现为鼓室、鼓窦内软组织密度影,鼓室扩大,窦入口扩大,鼓室壁破坏、硬化。听小骨移位、骨质吸收、破坏。其它征象包括乙状窦、鼓室盖、水平半规管、面神经管水平段骨质破坏。29例肉芽肿型中耳炎CT表现为中耳腔内的软组织密度影,部分有液平,鼓室壁增生、硬化,骨质破坏少见,听小骨可出现吸收破坏,但程度较轻,一般无移位。2例单纯型中耳炎表现为中耳腔内的软组织密度影,1例有液平,鼓室壁骨质硬化,无骨质破坏。结论:依据鼓室内软组织密度影的形态分布,鼓室壁破坏情况及听小骨改变,通过CT检查可对大部分慢性中耳炎做出明确诊断。

Objective ：To investigate the computer tomography of diagnosis value in chronic middle ear. Method： CT imaging of the temporal bone were retrospectively conducted on 45 patients with chronic middle ear as confirmed by surgery and pathology. Result： The major CT findings in the middle ear cholesteatoma on 14 patients were present with soft tissue in tympanic cavity and tympanic sinus. The middle ear cavity and the oral of sinus enlargement, the bone of tympanic cavity destruction and cirrhosis , the ossicular chain imaging include transitional , erosions ,osteolysis , destruction etc , other imaging include bone structure , destruction of tegmen and sigmoid sinus and erosion of facial nerve cannal, the major CT findings in the middle ear exudation on 29 patients were present with soft tissue , and in part with hydropneumo ,the bone of tympanic cavity proliferation and cirrhosis, ordinary no destruction , the ossicular chain can be erosions and destruction , but more slight and no transitional . the major CT findings in simple chronic middle ear on 2 patients were soft tissue in middle ear cavity ,and 1 patient findings hydropneumo, the bone of tympanic cavity cirrhosis ,no destruction . Conclusion： Through the CT examination make correct diagnosis with most partly of the chronic middle ear can be made according to the soft tissue , the bone of destruction and the ossicular chain in middle ear cavity .