正常成人头颈部动脉MDCT直径测量研究

MDCT measurement of cervicocerebral arteries of normal adult

目的:通过多排螺旋CT血管成像(MDCTA)测量头颈部动脉,建立各主要组成血管及分支直径的正常参考值,并探讨其临床意义。方法:常规影像学检查脑实质末见异常,且MDCTA检查显示拟测量动脉显影良好、走行自然、无变异、无病变的成人,按年龄分为3组(<40岁组、40～60岁组和>60岁组),每组随机选择40例(男、女各20例),共120例,年龄18～75岁,男性平均年龄(52.7±10.7)岁,女性平均年龄(50.2±11.5)岁。利用工作站进行血管三维成像并用自带的测量软件测量血管直径,分析各血管测量段直径性别、侧别和年龄组间的差异性,并计算出各部位动脉直径的正常参考值。结果:每例样本选择33支血管段进行直径测量,血管直径存在明显的性别差异,20段(60.6%)血管直径男性大于女性(P<0.05)。男性组26.7%(4/15)、女性组20%(3/15)的血管段直径左右侧差异具有显著性意义(P<0.05)。男女前交通动脉(ACoA)、男性后交通动脉(PCoA)、女性颈总动脉(CCA)、颈外动脉(ECA)、头臂动脉(BCA)和左侧锁骨下动脉(LSCA)直径在年龄组间差异有显著性意义(P<0.05)。结论:MDCTA能清晰显示头颈部动脉主干及其分支,正常头颈部动脉直径测量可以为有头颈部动脉形态改变的相关疾病的诊断提供有价值的影像学依据。

Objective： Using multi-detector row CT angiography to measure the value of normal dimension of cervicocere- bral arterial trunks and their main branches. Methods： One hundred and twenty adults performing multi-detector row CTA with no cervicocerebral arterial diseases and blood flow abnormalities, were divided into 3 groups according to their age（〈40y, 40-60y, 〉60y）, with 40 cases in each group （20 cases for each gender）. Images were taken to the workstation and measure- ments were done on 3D Images. All the results were statistically analyzed. Results： Results from measurements had shown that dimensions of 20 branches（60.6%） had significant difference between two genders（P〈0.05）. Dimensions of two genders＇ ACoA, male＇s PCoA, female＇s CCA, ECA, BCA and LSCA had significant difference in different age group （P〈0.05）. Conclusion： Cervicocerebral artery trunks and their branches can be clearly shown by multi-detector row CTA. Measurement of the normal dimension of cervicocerebral artery provides valuable imaging information in the diagnosis of cervicocerebral arterial diseases and diseases that can produce morphologic change of cervicocerebral artery.