利用螺旋CT数据建立上颈椎三维有限元模型

目的：建立上颈椎三维有限元模型．以期应用于临床相关的生物力学实验研究。方法：通过对正常人的CT薄层扫描获得原始DICOM图像数据．采用CAD数据处理技术进行计算机三维重建．改良建立的模型导进ANSYS9．0软件进行计算机模拟仿真生物力学研究。结果：所建模型外观清晰逼真。几何相似性好。三维重建结构可以单独或联合显示。甚至可行结构的任意取舍，重建结构的任意径线及角度均可进行适时三维测量。结论：该技术为临床医生对枕颈交界区有限元三维模型的建立提供了一种便捷而精确的方法，对计算机分析及研究该模型局部结构在各种受力情况下的生物力学表现创造条件。

Establishment of three-dimensional finite element model of human upper cervical vertebrae by spiral CT scans

Objective To construct a three-dimensional (3D) finite element model of human upper cervical vertebrae that can be applied clinically to the biomechanical research. Methods The primary DICOM images of normal human upper cervical vertebrae obtained via thin slice CT scans were reconstruct in 3D on the computer using the CAD data processing technique. The modified model was used to simulate the emulated biomechanical research with the ANSYS 9.0 software. Results The appearance of the model was vivid with great geometrical similarity. The 3D reconstruction could display craniovertebral junction independently or jointly. Any diameter of the structures reconstructed could be measured discretionarily at any angle. Conclusions It is a convenient and precise method for physicians to establish the finite element model of the craniovertebral junction. This method facilitates the computer study on the biomechanical behavior of the local structures of the model under various pressure conditions.