基于冰冻切片的人体骨盆有限元模型的建立与初步验证

 目的 建立基于冰冻切片的人体骨盆有限元模型，以用于研究骨盆非线性生物力学特性。方法 采用“中国数字虚拟人”第1例男性冰冻切片数据，运用切片图像处理软件CryoSegmentation提取出骨轮廓线，分别建立骨皮质、骨松质线模型和有限元模型。骨与软骨选用SOLID92四面体十节点单元，韧带采用2D索单元LINK10，分别赋予材料属性。结果 按骶髂关节为融合状态进行模型计算，应力主要集中部位是椎骨前面、骶髂关节面及周边、髂骨弓、坐骨大切迹、髋臼侧缘以及股骨颈；骶髂关节面应力主要集中在耳状面周缘，最大位移发生在L3；融合状态下各韧带所承拉力都较小。结论 基于冰冻切片的建模方法可获取更为精确的人体解剖结构信息，包含软组织条件的骨盆有限元模型的建立是基于CT和MRI有限元建模方法的重要补充。

Construction of a finite element model of human pelvis basing on the visible human cryosection and its initial verification

Objective To construct a three-dimension finite element model of human pelvis basing on the color photos of human-body cryosection,so as to research the nonlinear biomechanical properties of human pelvis. Methods The cryosection color photos of the first Chinese digitized virtual human were chosen as the database in the range from L3 to proximal 1/3 of femur.The image processing software CryoSegmentation was used to extract out the contours of cortical and cancellous bones.The obtained data were imported to...