MRI在面神经腮腺段的显示作用探讨  

Value of magnetic resonance imaging in displaying the parotid gland segments of the facial nerve

作　　者：杜立新[1] 元建鹏[2] 徐化剑[1] 杜恒峰[1] 梁碧玲[2] 

机构地区：[1]深圳大学第一附属医院放射科,广东深圳518035 [2]中山大学孙逸仙纪念医院,广东广州510120

出　　处：《南方医科大学学报》2010年第7期1639-1641,共3页Journal of Southern Medical University

摘　　要：目的探讨MRI在面神经腮腺段的显示作用。方法志愿者16例,男9例,女7例;腮腺肿瘤132例,良性89例,恶性43例。MR扫描采用T1WI、T2WI横断和冠状面成像,横断面向足侧成角35°,冠状面按常规扫描。132例腮腺肿瘤深、浅叶定位均经手术证实。结果面神经在横断面于T1WI呈低信号的弯曲弧线状,冠状面上,呈对称的圆点状低信号,并见条状小分支。63%的腮腺肿瘤在横断面可显示面神经,在冠状面上的显示比例可达83%。MRI在132例腮腺肿瘤的深、浅叶定位结果准确。结论 MRI能够显示大部分面神经,在腮腺肿瘤的深、浅叶定位和显示肿瘤与面神经的关系方面具有重要价值。Objective To evaluate the value of magnetic resonance imaging （MRI） in displaying the parotid gland segments of the facial nerve. Methods Sixteen volunteers （9 males and 7 females） and 132 surgically confirmed patients with parotid tumors locating in the deep or shallow lobe of the parotid gland （including 89 with benign and 43 with malignant tumors） underwent MRI using T1WI and T2WI. The transverse images were obtained with the plane tilted 35 degrees to the foot, and the coronal images were acquired using conventional scanning. Results On transverse T1WI, the parotid gland segments of the facial nerve displayed low signal with arc-shaped curve in the cross-section, showing a symmetrical dot-like low signal in the coronal plane. The facial nerve in 63% of the patients with parotid tumors in the cross-section could be displayed, but in the coronal plane the proportion reached 83%. MRI could accurately reveal the position of the parotid tumors in the deep or shallow lobe of the parotid gland. Conclusion MRI can show the major portion of the parotid gland segments of the facial nerve and has important value in locating the parotid tumors and displaying the relationship between the tumor and facial nerve.

关 键 词：面神经 腮腺肿瘤 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R322.85[医药卫生—诊断学]