摘要
目的：评价MRI对微小听神经瘤诊断的价值。材料和方法：12例经手术和病理证实的微小听神经瘤（直径均＜10mm），其中男4例，女8例，年龄36～59岁，平均42．5岁；均作Gd－DTPA增强MRI检查。结果；本组12例微上听神经瘤病例中，5例肿瘤局限在内听道内，7例大部分肿瘤在内听道内，部分突入桥小脑角池，肿瘤直径为4．5～9．7mm平均7．5mm；MRI表现为：（1）T1WI示病例第Ⅶ、Ⅷ神经束局部结节状增粗，呈等或稍低信号；（2）T2WI呈高或高等混合信号，并可显示内听道扩大；（3）Gd－DTPAT1WI增强后肿瘤明显均匀强化。结论：MRI是诊断微小听神经瘤非常有效的方法，Gd－DTPA增强扫描对作出正确诊断尤为重要。
Purpose: To evaluate MRI in the diagnosis of small acoustic neuroma. Materials and Methods: In 12 patients of small acoustic neuroma (D<10mm ), including 4 cases males and 8 cases females, aged from 36～59 years, average 42. 5 years , all were verified by operation and pathology, 12 patients performed enhanced MRI with Gd -DTPA. Results: In 12 cases, 5cases were located in internal auditory canal, 7cases were almost located in internal auditory canal and part in CPA cistern. The diameter of tumors were 4. 5～9. 7mm average 7. 5mm. The MRI findings of small acoustic neuroma were: The Ⅶ、Ⅷ nerves cords nodular widening locally, with equal or slightly low signal intensity on T1WI ; High or high -mixed signal intensity on T2WI, and to demonstrate the internal auditory canal is enlarged; Homogeneous enhanced signal after injection Gd - DTPA in T1WI. Conclusion: MRI is very useful method in the diagnosis of small acoustic neuroma,Gd -DTPA enhanced is important for diagnosis in T1 WI.
出处
《现代医用影像学》
1998年第3期102-104,共3页
Modern Medical Imageology
