基于生理的舌头建模与仿真

Physiology Based Tongue Modeling and Simulation

针对舌头的建模与仿真,提出一个基于解剖学和生物力学的精确的三维舌头模型.首先是解剖学建模,依据核磁共振影像数据构建了舌头的三维模型,其内部的肌肉和肌纤维由一种基于解剖学资料的交互式肌肉标记法标记得到;然后是生物力学建模,采用精细的生物力学建模技术来体现舌头的弹性特性,包括舌头肌肉的主动和被动收缩特性;最后基于有限元方法计算得到舌头模型的动态形变.实验结果表明,该模型具有很高的精确性,能够根据肌肉激励生成逼真的舌头运动,合成高真实感的舌头动画.

Simulation of the tongue has important applications in biomechanics, linguistics, medical science, and graphics. This paper presents a 3D anatomically and biomechanically accurate tongue model. To ensure anatomical accuracy, the tongue and its muscles are constructed based on accurate medical data. Due to their complexity, muscles geometry and fiber arrangement are specially specified by a proposed interactive mus-cle marking method. To ensure biomechanical accuracy, a nonlinear, quasi-incompressible, isotropic, hy-perelastic constitutive model is applied for describing the tongue tissues, and particularly, tongue muscles are additionally endowed with an anisotropic constitutive model, which reflects the active and passive me-chanical behavior of muscle fibers. The dynamic simulation results of tongue movements subjected to cer-tain muscle activations are presented and validated with experimental data, and experiments show that our tongue model can synthesize realistic tongue animation.