摘要
目的探讨16层螺旋CT多平面重建(MPR)和曲面重建(CPR)技术对面神经管正常解剖及变异的显示能力及其CT表现。方法选取2006年3月—2006年9月来我院行鼻旁窦螺旋CT检查且无颞骨病变的患者70例,其中成人50例(100耳),儿童20例(40耳);将原始图像传至后处理工作站,分别采用MPR及CPR两种图像后处理技术对面神经管进行重建。在重建出的MPR斜矢状面、MPR斜横断面及两幅CPR图像上观察面神经管的正常形态,并在不同重建图像上分别对面神经管各段的长度、宽度、前后膝角度进行测量。结果MPR与CPR者对鼓室段长度和宽度的测量结果存在明显差异,MPR斜矢状面测得鼓室段长度小于CPR测值(P<0.05),二者对面神经管骨壁裂缺的显示率差异无统计学意义(P>0.05)。MPR与CPR对膝状神经节骨壁裂缺显示率均为21.43%(30/140),对鼓室段骨壁裂缺显示率分别为32.86%(46/140)、31.43%(44/140,P>0.05)。乳突段长度在成人为(13.68±1.05)mm,儿童为(9.98±0.92)mm,儿童乳突段长度明显小于成人(P<0.05)。面神经管乳突段宽度、迷路段及鼓室段长度和宽度、前后膝角度在成人和儿童之间差异无统计学意义(P>0.05)。结论多层螺旋CT多平面和曲面重建技术是研究面神经管影像解剖的良好方法,合理结合应用可为面神经病变的诊断治疗提供可靠信息。
Objective To investigate multislice CT （MSCT） findings of intratemporal facial nerve canal with multiplanar reconstruction （MPR） and curved-planar reconstruction （CPR）. Methods MSCT was performed in 70 patients with paranasal sinusitis without abnormality in temporal bone including 50 adults and 20 children. Original images were transferred to workstation for image processing. According to the course of intratemporal facial nerve canal, MPR and CPR images were acquired. Facial nerve canal and relation with adjacent structures were measured in different MPR and CPR images. The appearances of facial nerve canal in different images and age groups were compared. Results The length of tympanic segment on CPR image was longer than that on MPR image, and its width on MPR image was wider than that on CPR image （P〈 0.05）. However, there was no significant difference in the length and width of labyrinthine and mastoid segment between MPR and CPR images （P〉0.05）. The CPR images acquired in the coronal plane showed the first genu exactly, while the CPR images acquired in the axial plane showed the second genu exactly. The dehiscent incidence of the first genu was 21.4 % on both MPR and CPR images, and 32.9%, 31.4% of the tympanic segment on MPR and CPR images, respectively （P〉 0.05）. One ear with the bifurcate of the tympanic segment was shown on MPR image, but missed on CPR images. The length of mastoid segment in adults was longer than that in children （P〈0.05）. Conclusion MPR and CPR images by multislice spiral CT are both valuable methods of facial nerve canal assessment. In combination with primitive axial images, MPR and CPR images may provide reliable evidence for the diagnosis and surgical treatment of facial nerve diseases.
出处
《中国医学影像技术》
CSCD
北大核心
2008年第11期1729-1732,共4页
Chinese Journal of Medical Imaging Technology
基金
北京市科技新星项目(2004-B-31)
北京市自然基金项目(7062019)
