基底动脉的CT表现与眩晕或头晕的关系:151例常规CT与临床表现的对照研究

Basilar Artery: Control Study of Conventional CT Findings and Clinic Profiles in Patients with Dizziness and Vertigo

目的 探讨分析中老年人的头晕或眩晕与其常规头颅CT平扫所示基底动脉表现的关系。方法 收集 815例常规头颅CT平扫的影像 ,分析其中 15 1例 5 0或 5 0岁以上有眩晕或头晕症状患者的基底动脉的CT密度、直径、分叉高度和位置 ,并与非眩晕组对照。结果 中老年眩晕或头晕患者基底动脉的CT值及直径的平均值大于非眩晕组 ,P值分别为0 .0 0 3及 0 .0 3 6;非眩晕组 85 %的患者CT值范围为 2 0～ 44 .6Hu ,而眩晕组大于 44 .6Hu的占 3 0 .5 % ;位置及分叉高度两组没有差异。结论 常规头颅CT平扫基底动脉密度的增高、直径的增宽提示患者可能为血管性眩晕 ,应进一步检查除外基底动脉病变。

Objective To analyze the relation between dizziness or vertigo in aged patients and the basilar artery(BA) images on conventional CT. Methods The conventional CT images of 815 BAs were observed and measured. The density, diameter, hight, and position of the BA images for 151 aged patients above 50 with dizziness and vertigo were analyzed and compared with those of patients without dizziness or vertigo. Results The average density and diameter of the BA of patients with dizziness or vertigo were higher than those of the group without dizziness or vertigo. The P values were 0.003 and 0.036, respectively. The CT values of 85% cases in the group without dizziness or vertigo were from 20 to 44.6Hu, while 30.5% cases in the group with dizziness or vertigo had CT values greater than 44.6Hu. The position and height of the two groups had no difference. Conclusion The increase of CT values and diameters of the BA for patients with dizziness or vertigo on conventional brain computed tomography plain scan probably indicates vascular induced vertigo. Further examinations are necessary to exclude BA diseases.