肉芽肿型和胆脂瘤型中耳炎的X线平片与CT对照观察

目的:探讨CT和X线平片在诊断慢性中耳炎中的作用。方法:搜集经手术病理证实的肉芽肿型和胆脂瘤型中耳炎33例,术前同时行CT和X线平片检查,比较分析其CT和X线表现,并与手术结果对照。结果:33例中,肉芽肿型中耳炎6例,胆脂瘤型中耳炎2 7例,X线平片和CT发现乳突骨质破坏分别为18例和32例,两者差异有显著性意义(P<0. 0 5 ) ;鼓窦入口扩大分别为13例和2 0例,破坏区边缘硬化分别为10例和17例,两者之间差异均无显著性意义(P >0 .0 5 ) ;CT发现7例外耳道软组织病灶和2 4例听小骨破坏中的2 3例,而X线平征均不能显示。结论:X线平片可作为中耳炎的初选检查方法,CT是中耳炎的重要检查手段

Comparison study of X-ray plain film and CT findings in granulomatous and cholesteatoma type of chronic middle otitis

Objective:To explore the using value of X-ray plain film and CT in chronic otitis.Methods:Findings on plain film and CT in 33 cases with granulomatous and cholesteatoma type of chronic otitis were analyzed comparatively.Results:There were 6 cases with granulomatous and 27 cases with cholesteatoma type of chronic otits.Bone erosion was showed on plain film and CT in 18 and 32 cases respectively,and the hardened border of destuction was displayed in 10 and 17 cases,while entrance way of antrum enlargement was seen in 13 cases and 20 cases.There was significantly statistical difference in bone findigns on X-ray plain film and CT,and no statistical difference in entrance way of ditus and antrum enlargement and hard border between X-ary and CT scan,7 cases with soft tissues in external auditory canal and 23 case with destruction in ossicular chain were showed on CT,which could not been displayed in X-ray film.Conclusion:X-ray is a primary way to diagnose otitis media,while CT is a important examination method.