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目的：探索ＭＲＩ鉴别胆脂瘤和肉芽组织的能力。材料和方法：对１０例慢性中耳炎患者术前行ＭＲＩ扫描，计算病变组织驰豫时间（Ｔ２）的变化，与术后病理类型对照。结果：胆脂瘤、肉芽组织和脑组织之间，横向驰豫时间Ｔ２呈显著性差异（Ｐ＜０．０５），变化范围分别为８１２ｍｓ－４３２ｍｓ、１４７４ｍｓ－９２２ｍｓ和１７４ｍｓ－１４４ｍｓ。结论：胆脂瘤、肉芽组织和脑组织横向驰豫时间（Ｔ２）具有可区别的范围，ＭＲＩ中Ｔ２值有助于鉴别上述不同的病理类型。
Objective: To explore the ability of MRI to identify cholesteatoma and granulation tissue. Materials and Methods: Ten patients with chronic otitis media were scanned with MRI before operation, and the change of pathological relaxation time (T2) was calculated, which was compared with the pathological type. Results: There was a significant difference in T2 relaxation time between cholesteatoma, granulation tissue and brain tissue (P <0.05), ranging from 812 ms-432 ms, 1474 ms-922 ms and 174 ms-144 ms, respectively. Conclusions: The transverse relaxation time (T2) of cholesteatoma, granulation tissue and brain tissue has a distinguishable range. The T2 value in MRI may be helpful in differentiating the above pathological types.