颞骨区血管与气房间骨壁的HRCT分析

HRCT analysis of the bone wall between vascular and air cells in temporal bone

目的观察HRCT图像上颈内动脉管、颈静脉孔及乙状窦沟的完整性。方法回顾性分析166名受检者(332耳)的颞骨HRCT图像。行颞骨CT MPR,观察颈内动脉管、颈静脉孔及乙状窦沟的完整性。利用三维VR技术获得颞骨气化容积,分析骨壁裂缺与无裂缺颞骨气化容积的差异性。结果受检者颈内动脉管、颈静脉孔、乙状窦沟裂缺发生率分别约2.41%(8/332)、0.90%(3/332)、2.71%(9/332)。骨壁完整受检者颞骨气化容积平均约(5.43±2.43)ml。不同性别及侧别间颞骨气化容积差异均无统计学意义(P均>0.05)。各骨壁裂缺耳分别与完整骨壁耳相比颞骨气化容积差异均无统计学意义(P均>0.05)。结论健康受检者颞骨区血管与气房间骨壁可发生裂缺,在诊断血管源性搏动性耳鸣时应注意鉴别。

Objective To observe the integrity of the carotid artery canal,jugular foramen and sigmoid sinus groove with HRCT.Methods Totally 166（332 ears） subjects＇ HRCT images regarding the occurrence of dehiscent sigmoid sinus groove,dehiscent jugular foramen and dehiscent internal carotid artery canal were analyzed retrospectively.The volume of temporal bone pneumatization was measured by volume rendering technique with three-dimensional reconstruction,and the volume of temporal bone pneumatization between the dehiscent ears and the intact ones were compared.Results The incidence of dehiscent carotid artery canal,dehiscent jugular foramen and dehiscent sigmoid sinus groove of 166 subjects was 2.41%（8/332）,0.90%（3/332） and 2.71%（9/332）,respectively.The mean volume of temporal bone pneumatization with intact bone walls was（5.43±2.43）ml.The differences in volume between the genders and the sides were not statistically significant（all P0.05）.There was no statistical difference in the volume of temporal bone pneumatization between the dehiscent ears and the intact ones.Conclusion Dehiscence could happen in the bone wall between vascular and air cells in temporal bone of normal people,which should be distinguished in the diagnosis for vascular pulsatile tinnitus.