Title: [Feasibility study of cone-beam CT in displaying facial nerve canal].
Abstract: 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. The defects of the wall of facial nerve canal were also observed in the images of both scanners. Results: 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.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,如面神经管鼓室段外壁等,显示效果好于MSCT。.
Publication Year: 2018
Publication Date: 2018-06-19
Language: en
Type: article
Indexed In: ['pubmed']
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Cited By Count: 1
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