采用小线圈和三维稳态自由进动快速成像脂肪抑制序列显示腮腺段面神经及腮腺导管的价值  

Value of visualization of the intraparotid facial nerve and parotid duct using a micro surface coil and three-dimensional fast imaging with steady state precession with fat-suppression sequence

作　　者：洪桂洵[1] 初建平[1] 周宙 饶良俊[1] 李树荣[1] 潘碧涛[1] 李竹浩[1] 杨智云[1] 孟悛非[1] 

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

出　　处：《中华放射学杂志》2015年第9期641-645,共5页Chinese Journal of Radiology

基　　金：国家自然科学青年基金（81201074）;中山大学青年教师培育计划（13ykpy14）

摘　　要：目的探讨采用小线圈和三维稳态自由进动快速成像脂肪抑制（3D-FISP-FS）序列显示腮腺段面神经及腮腺导管的价值。方法前瞻性收集18名腮腺常规MRI平扫未发现异常的健康志愿者纳入研究。受试者分别采用头颈线圈（36侧）、4cm环形小线圈（32侧）行腮腺3D—FISP—FS序列扫描。对所获得的图像行MPR、MIP及CPR重组，并观察腮腺区结构的MRI信号特征、对图像质量进行主观评分、测量计算面神经信号强度比（SIRN）和腮腺导管信号强度比（SIRD）、观察面神经及腮腺导管的显示。头颈线圈、小线圈3D-FISP-FS序列图像的评分采用配对资料的符号秩和检验比较，2组图像的SIRN、SIRD采用配对资料t检验比较，2组图像上对面神经及腮腺导管的显示采用x^2检验比较。结果18名志愿者均顺利完成腮腺MRI扫描。3D-FISP-FS图像上，腮腺实质为稍低信号，肌肉组织呈中等信号，血管呈等、稍高或高信号，面神经腮腺段呈线样高信号影弯曲走行，腮腺导管呈弧形高信号，淋巴结呈肾形、类椭圆形或梭形高信号影。采用头颈线圈和小线圈图像的主观评分分别为（2．0±0．9）、（1．5±0．7）分，差异有统计学意义（Z=-2．714，P=0．007），小线圈组图像质量优于头颈线圈组。头颈线圈和小线圈图像的SIR。分别为1．7±0．8、2．1±1．2，SIRD分别为1．8±0．7、2．5±1．7，差异组间比较均有统计学意义（t值分别为2．978、2．427，P值分别为0．006、0．031）。采用头颈线圈和小线圈均可显示全部面神经主干。头颈线圈图像上可显示面神经腮腺段一级分支颞面干25侧、颈面干15侧，面神经腮腺段二级分支颞面干分支17侧、颈面干分支11侧，腮腺导管16侧；小线圈图像上可显示面神经腮腺段一级分支颞面干30侧、颈面干28侧，面神经腮腺段二级分支颞面干分支26侧、颈面干分支23侧，腮腺导管27�Objective To explore the value of small surface coil combine with three-dimensional fast imaging with steady state precession and fat-suppression （3D-FISP-FS） sequence in displaying intra-parotid facial nerves segment and parotid ducts.Methods The parotid regions of 18 healthy volunteers who were excluded any parotid diseases were scanned by head ＆ neck coil （36 sides） and 4 em small surface coil （32 sides） combined with 3D-FISP-FS sequence prospectively. The obtained original images were treated through MIP, MPR and CPR, The MRI signal characteristics of parotid region structure, the subjective score of image quality, the signal intensity ratio （SIR） of facial nerve/parotid tissue （SIRN） and parotid duct/parotid tissue （SIRD） was calculated, and the displaying rates of the facial nerves and parotid ducts were observed. Wilcoxon matched-samples signed rank sum test was used to compare the scores of head ＆ neck coil and small coil 3D-FISP-FS sequence images, paired t test was used to compare SIRN, SIRD of the two groups, Chi-square test was used to compare of the displaying rate of the facial nerves and parotid ducts in two groups. Results Eighteen volunteers were successfully performed MRI scan of parotid gland. On 3D-FISP-FS sequence images, the parotid gland was showed slightly low signal intensity, muscle tissue was showed medium signal intensity, the vessels were showed slightly high or high signal, parotid segment of facial nerve was showed tortuous line-like high signal intensity, and parotid duct was showed curve high signal intensity, lymph nodes were showed kidney shaped, oval or spindle shaped high signal intensity structures. The subjective scores for head and neck coil and coil images were （2.0±0.9） and （1.5 ＋ 0.7） respectively, and the difference was statistically significant （Z=- 2.714, P=0.007）, image quality of small coil group was better than that of head and neck coil group. The SIRD of the two groups was 1.7±0.8 and 2.1±1.2 respectively, and the SIRD

关 键 词：腮腺 面神经 腮腺导管 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]