摘要
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 explore the methodology of the establishment of three-dimensional fluid dynamics analysis model of nasal cavity, and to provide the basis for study of the impact of nasal structure on the flow field. Methods DICOM-format data files were obtained via spiral thin CT scans, and then input into three- dimensional reconstruction software （Mimics）. Fuid dynamics analysis software was applied to reconstructing the three-dimensional model of nasal cavity. Obtained relevant information about the nasal airflow field was analyzed. Results The three-dimensional model and physical nasal cavity structure had good similarity with minor operation error and high-resolution modeling. Pressure equivalent diagram, velocity vector, and nasal airflow trace line graph, which were obtained by analysis, could directly and objectively reflect the characteristics of nasal airflow field. Conclusion Application of DICOM data to computer-aided modeling is a fast, accurate and etticient modeling method. Three-dimensional model of the nasal cavity has high accuracy and good repeatability. Obtained relevant information about the nasal airflow field by analysis can be processed into observable graphics, which not only can directly and objectively reflect the characteristics of nasal flow, but also can provide an innovative research method for clinical study of the impact of nasal structure on the flow field.
出处
《中国耳鼻咽喉颅底外科杂志》
CAS
2010年第5期321-325,共5页
Chinese Journal of Otorhinolaryngology-skull Base Surgery
关键词
计算流体力学分析
数字影像和通信标准
交互式的医学影像控制系统
气流场
Computational fluid dynamics （ CFD ）
Digital imaging and communications in medicine （ DICOM ）
Materiaise ＇ s interactive medical image control system （ Mimics ）
Airflow field
