采用小线圈和三维双回波稳态水激励序列显示下颌神经的价值  

The value of magnetic resonance imaging of the mandibular nerve using a micro surface coil and three-dimensional double-echo steady-state with water excitation sequence

作　　者：洪桂洵[1] 汪倩倩 初建平[1] 江利[1] 李竹浩[1] 何绍富 饶良俊[1] 杨智云[1] Hong Guixun;Wang Qianqian;Chu Jianping;Jiang Li;Li Zhuhao;He Shaofu;Rao Liangjun;Yang Zhiyun(Department of Medical Imaging, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China)

机构地区：[1]中山大学附属第一医院医学影像科,广州510080 [2]广东省台山市人民医院放射科

出　　处：《中华放射学杂志》2018年第6期421-425,共5页Chinese Journal of Radiology

摘　　要：目的探讨采用小线圈和三维双回波稳态水激励（3D-DESS-WE）序列显示下颌神经及其分支的价值。 方法前瞻性收集52名健康志愿者，采用小线圈和3D-DESS-WE序列行单侧颌面部扫描。参照格氏解剖学图谱，根据下颌神经及其分支的解剖位置对图像行MPR及CPR重组，并分析神经及邻近结构的MRI信号特征、评价下颌神经及其分支的显示率、对图像质量及神经显示情况进行主观评分、测量神经及邻近翼外肌的信号强度（SI），并计算两者的信号强度比（SIR）。 结果与肌肉相比，神经呈中等信号。图像质量的平均主观评分为（3.02±0.82）分。下颌神经主干、前干及颊神经、后干及其分支下牙槽神经、舌神经的显示率均为100%，其中下颌神经后干、下牙槽神经、舌神经显示最佳，图像质量主观评分均在3.00分以上，SIRN/M接近1.00。耳颞神经、咬肌神经显示也基本满意，下颌舌骨肌神经、翼内肌神经及翼外肌神经显示率较低。 结论小线圈联合3D-DESS-WE序列，结合MPR及CPR图像后处理技术，可以清楚显示下颌神经及其分支，适合在临床应用。ObjectiveTo explore the value of small surface coil combined with three-dimensional double-echo steady-state with water excitation （3D-DESS-WE） sequence in displaying mandibular nerves and their branches. MethodsThe maxillofacial regions of 52 volunteers were scanned unilaterally by a small surface coil combined with 3D-DESS-WE sequence. According to the Gray＇s anatomy atlas, MPR and CPR was done according to the anatomic position of mandibular nerve and the branches, the signal characteristics of the nerves and neighboring structures were analyzed. The displaying rate of the mandibular nerves and their branches were evaluated.The image quality and display of the nerve were subjectively scored. The signal intensity（SI） of the nerve and adjacent lateral pterygoid muscle were measured. The signal intensity ratio（SIR） of mandibular nerve/lateral pterygoid muscle （SIRN/M） was calculated. ResultsCompared with the muscles, the nerve showed iso-signal intensity. The subjective scores for all small coil 3D-DESS-WE images were 3.02±0.82. The displaying rates of V3 trunk, anterior trunk, buccal nerve, posterior trunk, inferior alveolar nerve and lingual nerve were all 100%. V3 posterior trunk, inferior alveolar nerve and lingual nerve showed the best quality scores, which were all about 3 points, and the SIRN/M were about 1. The auricular temporal nerve and masseter muscle nerve were also basically satisfied. The displaying rate of mylohyoid muscle nerve, medial pterygoid nerve and lateral pterygoid nerve was low. ConclusionSmall surface coil combine with 3D-DESS-WE sequence performed high-quality in mandibular nerves and their branches MR imaging using MPR, CPR post-processing technology, which are suitable for clinical application.

关 键 词：下颌神经 磁共振成像 小线圈 

分 类 号：R445.2[医药卫生—影像医学与核医学]