The image variations in mastoid segment of facial nerve and sinus tympani in congenital aural atresia by HRCT and 3D VR CT
The image variations in mastoid segment of facial nerve and sinus tympani in congenital aural atresia by HRCT and 3D VR CT
复制标题
先天性耳道闭锁患者面神经乳突段和鼓室的HRCT和3D VR CT图像变化
DOI：
10.1016/j.ijporl.2015.06.014
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发表时间：
2015-09-01
影响因子：
1.5
通讯作者：
Chen, Xiaowei
中科院分区：
文献类型：
--
作者：
Wang, Zhen;Hou, Qian;Chen, Xiaowei
目的：利用高分辨率（HR）CT和三维容积再现（VR）CT图像，观察先天性外耳道闭锁（CAA）患者中耳结构的变化，包括面神经乳突段的空间分布和鼓室窦的形态。对25例先天性外耳道闭锁患者进行了HRCT检查，包括6例双侧外耳道闭锁患者（n = 25，男21例，女4例，平均年龄13.8岁，范围6 - 19岁）。沿着后半规管壶腹长轴行斜轴位多平面重建（MPR），观察圆窗及面神经乳突段的显示。体绘制技术用于显示形态学特征。结果：在基本平面上，面神经乳突段与圆窗的水平线距离（h-RF）闭锁耳较对照耳明显缩短（P <0.05），面神经乳突段与圆窗的水平线距离（h-RF）闭锁耳较对照耳明显缩短（P <0.05）。鼓室窦面积（a-ST）与FN与RW中点水平线之间的距离（h-RF）呈显著负相关（P <0.05）。闭锁组鼓室窦平均面积大于闭锁组（P <0.05）。将鼓室窦的形态分为杯状、梨状和靴状三种。面积测量结果表明，靴形鼓室窦是一种特殊的变异，面积较大，仅见于CAA组。靴形组与其他两组比较，差异有统计学意义（P <0.05）。结论：HRCT和3D VR CT能更好地显示CAA耳面神经乳突段和鼓室窦的各种变异。它可以进一步帮助外科医生做出正确的听力康复决定。(C)2015爱思唯尔爱尔兰有限公司版权所有。
Objective: To find the variations of middle ear structures including the spatial pattern of mastoid segment of facial nerve and the shapes of the sinus tympani in patients with congenital aural atresia (CAA) by using the high-resolution (HR) CT and 3D volume rendered (VR) CT images.Methods: HRCT was performed in 25 patients with congenital aural atresia including six bilateral atresia patients (n = 25, 21 males, 4 females, mean age 13.8 years, range 6-19). Along the long axis of the posterior semicircular canal ampulla, the oblique axial multiplanar reconstruction (MPR) was set to view the depiction of the round window and the mastoid segment of facial nerve. Volumetric rending technique was used to demonstrate the morphologic features. HRCT and 3D VR findings in atresia ears were compared with those in 19 normal ears of the unilateral ears of atresia patients.Results: On the basic plane, the horizontal line distances between the mastoid segment of the facial nerve and the round window (h-RF) in atresia ears significantly decreased compared to the control ears (P < 0.05). There was a significant negative correlation between the sinus tympani area (a-ST) and the distance between the horizontal lines of FN and RW midpoint (h-RF)(P < 0.05). The mean area of sinus tympani in atresia group is larger (P < 0.05). The shapes of the sinus tympani were classified into three categories: the cup-shaped, the pear-shaped and the boot-shaped. Area measurement indicated that the boot-shaped sinus tympani was a special variation with a large area, which only appears in CAA group. There were a significant difference between the area of the boot-shaped group and the other two groups (P < 0.05). The morphologic differences of ST and other middle ear structures can also be observed visually in 3D VR CT images.Conclusion: HRCT and 3D VR CT could help a better understanding of different kinds of variations in mastoid segment of facial nerve and sinus tympani in CAA ears. And it may further help surgeons to make the correct decision for hearing rehabilitation. (C) 2015 Elsevier Ireland Ltd. All rights reserved.