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目的通过建立用于流体力学分析的鼻腔三维模型,探讨建立三维模型的方法,为研究鼻腔内结构对气流场的影响提供基础。方法螺旋CT薄层扫描获取DICOM格式数据文件,导入三维重建软件Mimics,并应用流体力学分析软件重建鼻腔三维模型,计算分析后获得鼻腔气流场相关信息。结果所建鼻腔三维模型与实体鼻腔结构有较好的相似性,并且操作误差小,建模分辨率高,流体力学分析并模拟鼻腔不同层面的压力等值图、速度矢量图和鼻腔气流流动迹线图,能客观直接的反映出鼻腔气流场特性。结论应用DICOM数据计算机辅助建模法是一种快捷、准确、高效的建模方法,该实验所建鼻腔三维模型精确度高,操作的可重复性好,计算分析后获得的鼻腔气流场相关数据,处理转换成直观图形,不仅能客观直接的反映出鼻腔气流场特性,同时还能为临床上研究鼻腔结构对鼻腔功能的影响提供了一种新型的研究方法。
Objective To establish a three-dimensional model of nasal cavity for fluid mechanics analysis and to explore the method of establishing three-dimensional model to provide a basis for studying the influence of nasal structure on the airflow field. Methods DICOM data files were acquired by spiral CT thin-layer scanning and imported into 3D reconstruction software Mimics. The three-dimensional nasal cavity model was reconstructed with fluid mechanics analysis software, and the relevant information of nasal airflow field was calculated and analyzed. Results The built-in three-dimensional model of nasal nasal cavity had a good similarity with the nasal cavity structure of the nasal cavity, and the operation error was small and the modeling resolution was high. The hydrodynamic analysis and simulation of the pressure contour map, speed vector and nasal flow trace Line graph, can objectively and directly reflect the nasal airflow field characteristics. Conclusion The computer aided modeling method using DICOM data is a fast, accurate and efficient modeling method. The three-dimensional model of nasal cavity built by this experiment has high precision and good repeatability of operation, and the relevant data of nasal airflow field calculated and analyzed , The conversion of the treatment into an intuitive figure not only objectively and directly reflects the characteristics of the nasal airflow field, but also provides a new research method for the clinical study of the influence of nasal structure on nasal function.