基于有限元方法的角膜组织热分析研究

生物医学与虚拟现实技术、计算机仿真技术的结合是现代科学与技术的一个重要发展趋势。为了解决角膜热成形术中的预测性及可控制性问题，本文针对角膜的特性进行医学虚拟研究，分析其变形机理；利用有限元方法，模拟了激光作用于眼角膜时的温度场分布情况，给出了不同参数下的激光作用时角膜的温度场分布曲线和穿透深度的比较；仿真结果表明，激光能量对角膜组织穿透深度影响很大，为角膜热成形术的研究提供了定性的基础，在减少实验费用、提高手术的预测性方面有非常重要的价值。

YANG Yan -fang , ZHANGhang Bo , LIU Wen -lu , CHEN Ding -fang

The combination of biomedicine with virtual reality and computer simulation is an important development trend. To improve the prognostication and controllability in laser thermokeratoplasty, in this paper, the characteristic of cornea was made medicine virtual study and the mechanism of distortion was analysed. Finite element methods were used to simulate the distribution of temperature field when laser acting on comea, presenting the distribution curve of temperature field and the comparing penetration depth when laser acting on cormea with different parameters. The result indicates that the penetration depth of cornea organization can be remarkably effected by laser energy, which provides the qualitative foundation for study on laser thermokeratoplasty and is valuable in reducing experimental expenses and improving controllability.