基于CT的正常与骨质疏松股骨模态分析
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摘要
通过对志愿者人体股骨的CT影像数据进行图像处理,获得高精度的股骨三维模型,采用正向工程建立有限元模型,针对股骨的各向异性的材料特性,应用股骨材料属性经验公式获得正常股骨的材料属性与骨质疏松的股骨材料和属性,利用ANSYS MODAL仿真软件对正常股骨、骨质疏松的股骨进行前6阶模态计算,获得前6阶的股骨振动频率。根据所得数据,可对股骨假体置换手术提供借鉴,应避免与股骨的频率相近而产生谐振。
Through image processing of CT image data of human femur of volunteers, a high-precision threedimensional model of femur is obtained. A finite element model is established by forward engineering. According to the anisotropic material properties of femur, the material properties of normal femur and the femoral material and properties of osteoporosis are obtained by using empirical formula of femoral material properties. The first 6 modes of normal femur and osteoporotic femur are calculated by using ANSYS MODAL simulation software to obtain the first 6 modes of femur vibration frequency. According to the obtained data, it can provide reference for femoral prosthesis replacement surgery and should avoid resonance caused by the frequency close to that of femur.
Through image processing of CT image data of human femur of volunteers, a high-precision threedimensional model of femur is obtained. A finite element model is established by forward engineering. According to the anisotropic material properties of femur, the material properties of normal femur and the femoral material and properties of osteoporosis are obtained by using empirical formula of femoral material properties. The first 6 modes of normal femur and osteoporotic femur are calculated by using ANSYS MODAL simulation software to obtain the first 6 modes of femur vibration frequency. According to the obtained data, it can provide reference for femoral prosthesis replacement surgery and should avoid resonance caused by the frequency close to that of femur.
引文
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[2]陈广新,董默,宋海南,等.股骨3D模型构建在股骨头置换手术中的应用研究[J].软件,2017,38(12):74-77.
[3]陈龙,张军洋.基于CT股骨有限元模型精确重建及模态分析[J].计算机仿真,2014,31(2):280-281.
[4]韩树洋,葛世荣.人工全髋关节置换术对天然股骨生物力学行为的影响[J].医用生物力学,2010,12(6):471-474.
[5]张国栋,廖维靖,陶圣祥,等.股骨有限元分析赋材料属性的方法[J].中国组织工程与临床康复研究.2009,13(43):8436-8437.
[6]董鹏飞,雷建银,刘海波,等.基于CT图像的股骨上段有限元建模及单元尺寸分析[J].医用生物力学.2016,31(2):129-130.
[7]方国芳,林荔军,于博,等.不同状态下股骨的应力分布及临床应用[J].中国组织工程与临床康复研究.2012,16(17):3045-3047.
[8]郭文文,刘静,曹慧,等.正常与骨质疏松肱骨的三维重建及有限元分析[J].中国医疗设备.2018,33(4):34-36.
[9]汪金平,杨天府.股骨生物力学特性的有限元分析[J].中华创伤骨科杂志,2005,7(10):931-934.
[10]徐振炀,胡永成,叶金铎,等.股骨三维有限元模型的建模方法[J].天津理工大学学报,2015,10(31):52-54.
[11]陈国栋,罗羽婕,王锐英.有限元分析在股骨生物力学研究中的应用[J].实用医学杂志,2011,27(2):334-336.
[12]展影,雷新玮,屈瑾,等.不同股骨假体植入角度的髋关节表面置换术后股骨近端力学的有限元研究[J].国际医学放射学杂志,2010,33(5):451-455.
[13]吕志军,李玲.不同材料嵌体修复的三维有限元分析[J].齐鲁医学杂志,2010,25(5):445-446.
[14]成海平,柳松杨,王兴伟,等.人股骨上段三维有限元模型的建立[J].生物医学工程研究,2010,29(2):106-108.
[15]Bryan R,Mohan P S,Hopkins A,et al.Statistical modelling of the whole human femur incorporating geometric and ma1terial properties[J].Medical Engineering and Physics,2010,32(1):57-65.
[16]崔林江,张峰,修树毅.三种内固定治疗方法在股骨粗隆间骨折的应用[J].青岛大学医学院学报,2007,43(5):457-458.
[17]雷建银,刘海波,王志华,等.站立位下骨盆与骨折内固定稳定性分析[J].医用生物力学,2014,29(6):517-523.