摘要
目的以多层螺旋CT（MSCT）为参考，对比锥形束CT（CBCT）对面神经管显示的清晰度，探讨CBCT对面神经管成像的可行性及是否存在优势。方法2017年1月，对8具头部标本进行CBCT及MSCT扫描，分别获得16侧颞骨图像，对MSCT及CBCT图像上迷路段各壁、第一膝前、内、外、上、下壁、鼓室前段外壁、下壁、鼓室后段外壁、下壁、鼓室段内、上壁、第二膝外、下、上、内壁及乳突段各壁分别进行0-3分评分。同时记录面神经管壁局部缺损区。使用评分法比较面神经管各段管壁的清晰度，应用Wilcoxon法分析两种设备得分的一致性，P〈0．05为差异有统计学意义。结果共评估面神经管壁各段16处结构，两种设备对其中13处的评分显示差异均无统计学意义（均P〉0．05），对面神经管第一膝上壁、鼓室段外壁后部及鼓室段下壁前部的评分的差异有统计学意义（P〈0．05），CBCT得分高于MSCT，得分分别为：面神经管第一膝上壁MSCT（2．63±0．50）分，CBCT（2．94±0．25）分；鼓室段外壁后部MSCT（1．38±0．72）分，CBCT（1．81±0．54）分；鼓室段下壁前部MSCT（2．38±0．72）分，CBCT（2．94±0．25）分。所示面神经管骨壁缺损区最多位于鼓室段下壁前部（14／16）。结论与MSCT相比，应用CBCT对面神经管成像具有可行性，其与MSCT显示能力一致，对部分较细微结构．如面神经管鼓窜段外肇等．显示效果好于MSCT。
Objective To evaluate the image clarity of cone-beam computed tomography （CBCT） in displaying facial nerve canal and to investigate the feasibility of CBCT to display facial nerve canal and whether there are some advantages compared with MSCT. Methods Eight cadaveric heads were scanned using CBCT and MSCT and images of 16 temporal bones of each scanner were obtained. The imaging clarity of facial nerve canal of the two scanners was scored. Wilcoxon test was used to assess the difference of the two methods. P 〈 0. 05 was considered statistically significant. also observed in the images of both scanners. Results The defects of the wall of facial nerve canal were Sixteen structures of facial nerve canal were evaluated, including the wall of labyrinthine segment, the anterior, medial, lateral, superior, inferior wall of the first genu, the lateral, inferior wall of the anterior part of tympanic segment, the lateral, inferior wall of the posterior part of tympanic segment, the medial and superior wall of tympanic segment, the lateral, inferior, superior, medial wall of the second genu and the wall of mastoid segment. The clarity of thirteen structures showed no differences between the two scanners （P 〉 0. 05 ）. The clarity of three structures showed significant differences between CBCT and MSCT （ P 〈 0. 05 ）, which included the superior wall of the first genu, the posterior part of the lateral wall and the anterior part of the inferior wall of tympanic segment, and the scores of CBCT were higher than MSCT. The most frequent region of defect was in the anterior part of inferior wall of tympanic segment （ 14/16）, followed by the inferior wall of labyrinthine segment （9/16） and the superior wall of tympanic segment （6/16）. Conclusion Compared with MSCT, CBCT could also gain quite good imaging clarity for displaying facial nerve canal. The display effect of some fine structures, such as the lateral wall of tympanic segment, is better in the images of CBCT than in those of MSCT.
作者
张征宇
尹红霞
王振常
王争
李静
Zhang Zhengyu;Yin Hongxia;Wang Zhenchang;Wang Zheng;Li Jing(Department of Radiology, Beijing Unicare ENT Hospital, Beijing 100122, China)
出处
《中华医学杂志》
CAS
CSCD
北大核心
2018年第23期1832-1836,共5页
National Medical Journal of China
基金
国家自然科学基金国家重大科研仪器研制项目（61527807）
北京学者（京人社专家发[2015]160号）
北京市医管局“使命”人才计划（SML20150101）
关键词
面神经管
锥形束CT
体层摄影术
X线计算机
Facial nerve canal
Cone-beam computer tomography
Tomography
X-raycomputed
作者简介
通信作者：王振常，Email：cjr．wzhch@vip．163．com
