HRCT and contrast-enhanced MRI in diagnosis of facial nerve injuries
10.13929/j.1672-8475.201711004
- VernacularTitle:HRCT和增强MRI诊断面神经损伤
- Author:
Yunyun ZHAO
1
;
Wende NING
;
Jiping DONG
;
Yanjun GAO
;
Junjian ZHANG
;
Hongsheng LIU
;
Xiangchun YANG
Author Information
1. 西安交通大学附属西安市中心医院放射科
- Keywords:
Facial nerve;
Wounds and injuries;
Tomography,X-ray computed;
Contrast media;
Magnetic resonance imaging;
Curved plannar reformation
- From:
Chinese Journal of Interventional Imaging and Therapy
2018;15(4):230-233
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of HRCT and contrast-enhanced MRI in diagosis of facial nerve injuries.Methods HRCT and contrast-enhanced MRI were performed in 18 cases of facial nerve injuries.CPR of the facial nerve and canal was performed on the Philips EBW workstation,and the temporal bone involved location,fracture type and involvement of facial nerve and canal and its course were observed.The involved location,size,signal variation of facial nerve were analyzed compared with contralateral side on the GE AW 4.5 workstation.Results Among 18 cases,8 cases of longitudinal fractures,5 cases of transverse fractures and 5 cases of mixed fractures were found.HRCT axial scan and CPR of facial canal revealed that 18 cases had temporal bone fractures,including 1 case of labyrinthine segment,2 cases of geniculate fossa,4 cases of tympanic segment,2 cases of geniculate fossa,tympanic segment and hematoma of middle ear cavity,3 cases of tympanic segment with adjacent hematoma of middle ear cavity and 6 cases without obvious fracture of facial canal.Contrast-enhanced MRI and CPR of facial nerve revealed facial nerve injuries in all 18 cases,including 12 cases of internal auditory meatus segment,14 cases of labyrinthine segment,18 cases of geniculate ganglion,16 cases of tympanic segment and 15 cases of mastoid segment.Signal intensity ratio of affected internal auditory meatus segment,labyrinthine segment,geniculate ganglion,tympanic segment and mastoid segment were higher than those of contralateral side (all P＜ 0.001).Conclusion HRCT and contrast-enhanced MRI can clearly reveal the involvement of different segment of traumatic facial nerve,HRCT CPR and MR CPR are helpful to visualiz the involvement of traumatic facial nerve and canal.
