肺血管流动参数的CT相关测量研究  

CT study of parameters of flowing condition in pulmonary small vessels

作　　者：王丽华[1] 李润明[1] 郭佑民[2] 刘继汉[2] 

机构地区：[1]西安交通大学第二医院放射科,西安710004 [2]交通大学第一医院影像中心,西安710061

出　　处：《放射学实践》2003年第4期280-282,共3页Radiologic Practice

基　　金：卫生部重点学科建设项目 (卫规财 2 0 0 1- 32 1)号

摘　　要：目的 :探讨活体肺血管分支几何学和流动状态参数的特征。方法 :在 63例正常人胸部螺旋CT图像上测量2 0 1 0套两分支的血管横径 ,计算Z值和雷诺数 ,分析并判断不同横径血管内血液的流动状态。结果 :Z值与标本数据比较有显著不同 ;雷诺数随血管横径的增大而增大 ,但不超过 1 0 0 0。结论 :2～ 4mm的正常肺小血管内雷诺数 <1 0 0 0 。Objective:To explore the branching geometry and parameters of flowing condition of the pulmonary small vessels in vivo.Methods:2010 sets of dichotomous small pulmonary vessels were measured in chest helical CT of 63 normal cases.The value Z and the Renold number were calculated and participated to analysis the flowing condition in different vascular diameters. Results:Value Z showed different trend compared with the specimen;the Renold number calculated from Z went large with the vascular diameter,but not over 1000.Conclusion:In small pulmonary vessels of 2～4mm,the Renold number is less than 1000,which indicates the flowing condition in them is laminar flow.

关 键 词：肺小血管 分支几何学 流动参数 CT检查 雷诺数 层流 

分 类 号：R816.41[医药卫生—放射医学]