基于MRI切片的人体复杂结构的三维建模方法

目的：探讨使用Mimics软件构建包含皮肤、肌肉、脂肪以及骨骼的复杂三维人体模型的方法及意义。方法：利用MRJ（MagneticResonanceImaging）切片通过MIMICS软件分别建立人体骨骼、肌肉、脂肪、皮肤等几何面模型,准确表达人体组织和器官的复杂几何结构;将组织和器官的几何面模型导入到MAGICS中进行面网格划分,通过ANSYS软件将面网格转化为体网格,得到人体各器官和组织的三维几何体模型;进而给骨骼、肌肉、脂肪、皮肤分别赋予材料特性（弹性模量和泊松比等）,可以模拟真实人体组织和器官的物理属性。结果：利用MIMICS的布尔运算将各部分组织和器官进行组装,得到人体复杂结构的三维实体模型。结论：与目前常用的基于几何学的人体模型建模方法相比,使用该方法建立的三维实体模型可以完全模拟人体器官和组织的真实结构,等效程度高、建模速度快。所建立的数学模型可以直接用于3D打印、模具制造及等效假人的运动学和力学分析。广泛应用于医学、人机工程学等领域。

The 3d Modeling Method of Human Body Complex Structure with MRI Slices

Objective：To explore the methods and significance of use of Mimics software to construct the complex 3D body model included skin, muscle, fat and bone. Methods： MRI slices were used to establish the geometric surface model of human skeleton muscle , fat, skin , which accurately express the complexity of human tissues and organs geometry by MIMICS; The import of tissues and organs of geometric surface models to MAGICS of surface meshing, through ANSYS body surface grid can be converted to the grid, getting 3d geometry model of the organization and each organ;thus~to bones, muscles, fat, skin and were given material properties （ elastic modulus and Poisson＇s ratio, etc. ）,it can simulate the real human tissues and or- gans of the physical properties.. Results i Each part of the organization and the organs are assembled by using the Boolean operators of MIMICS, the complex structure of the human body to obtain three-dimensional solid model, n. Conclusions： And compared with geometry -based modeling methods, this method to create a three-dimensional solid model can be fully simulated human organs and tissues real structure, a high degree of equivalence, modeling speed, the mathematical model can be directly used for 3D printing, mold manufacturing and equivalent dummy kinematics and mechanical analysis, can be widely used in medicne, ergonomics and other fields.