目 的 探讨嗅神经肿瘤 (olfactory nerve tumor, ONB)的MRI影 像学表现及临床特点，用以指导临床诊 断。方法 回顾分析2009年9月至2011年9 月经手术病理证实的10例ONB患者，所有 患者均进行MRI平扫和增强扫描，分析其 临床特点及影像学表现。结果 10例患者 中的9例患者的MRI平扫结果显示为T1WI上 低信号软组织影，T2WI上高信号影，确诊 率高达90%。10例患者的MRI增强扫描结果 显示肿块明显不均匀强化，部分鼻副窦粘 膜有强化，确诊率高达100%，MRI增强扫 描的确诊率高于MRI平扫，诊断结果与临 床病理确认结果相比，差异无统计学意义 (P＞0.05)。结论 MRI影像分析可以清楚 显示肿瘤所在部位及侵犯范围，在嗅神经 肿瘤的诊断中具有非常高的应用价值，可 以作为嗅神经肿瘤的重要检查方法。

Objective To investigate the MRI imaging features and clinical features of olfactory nerve tumors in order to guide the clinical diagnosis. Methods The clinical and imaging findings of 10 patients with olfactory nerve tumors confirmed by surgery and pathology from September 2009 to 2011 were analyzed retrospectively. All patients underwent MRI plain scan and enhanced scan. Results The results of MRI plain scan showed low signal in T1WI and high signal in T2WI of the lesions in these patients, and the final diagnosis rate was 90%. MRI enhanced scanning results showed that the mass obviously uneven enhancement in the lesions of all patients, some of the nasal sinus mucosa was enhanced, the diagnosis rate was as high as 100%. The difference was not statistically significant compared with the results of clinical pathology(P＞0.05). The diagnostic rate of MRI enhanced scan was higher than that of MRI plain scan. Conclusion MRI can clearly show the location and extent of tumor invasion, which has high application value in the diagnosis of olfactory nerve tumors.