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目的:快速重建人体上呼吸道三维数值模型,分析上呼吸道解剖结构与流场分布特征。方法:基于健康志愿者头颅CT图像,重建人体上呼吸道三维数值模型,利用计算流体力学方法对上呼吸道气流进行数值模拟。结果:快速建立了包含鼻腔、咽和喉在内的上呼吸道三维数值模型,获取上呼吸道详细的解剖结构和气流分布特征。数值模拟结果表明,在鼻瓣膜区、鼻咽部、会厌上下缘部位呈现较大的速度梯度。结论:所建模型具有良好的仿真性,数值模拟结果提供人体呼吸道气体流动的基本趋势,证实所建上呼吸道三维数值模型可满足流体力学分析的需要,为异常上呼吸道气体流动特征提供对照数据和研究基础。
OBJECTIVE: To rapidly reconstruct the three-dimensional numerical model of the human upper respiratory tract and analyze the anatomic structure and distribution characteristics of the upper respiratory tract. Methods: Based on the cranial CT images of healthy volunteers, the three-dimensional numerical model of human upper respiratory tract was reconstructed and the upper respiratory tract airflow was numerically simulated by computational fluid dynamics. Results: The three-dimensional numerical model of upper respiratory tract including nasal cavity, pharynx and larynx was established quickly to obtain detailed anatomic structure and airflow distribution characteristics of the upper respiratory tract. Numerical simulation results show that in the nasal valve area, nasopharynx, epiglottis upper and lower edge showed a greater speed gradient. CONCLUSION: The model has a good simulation. The numerical simulation results provide the basic trend of human respiratory tract gas flow. It is confirmed that the built three-dimensional numerical model of upper respiratory tract can meet the needs of fluid mechanics analysis and provide the control data for abnormal upper respiratory tract gas flow characteristics. research Foundation.