肝脏虚拟手术仿真系统包括图像预处理、图像分割、体积估计，虚拟切割仿真等功能。
Virtual liver surgery simulation system consists of image pre-processing, image segmentation, volume estimation, the virtual cutting simulation and other functions.
为了提高虚拟手术仿真系统进行实际作业的能力，提出了以BP神经网络模型来代替有限元模型，实现实时的生物力学响应。
To raise capacity that virtual surgical simulation system deals with real work, this article introduces BP NN model instead of finite element model, and realizes real-time biomechanical response.
本文针对支撑喉镜下喉部手术的虚拟系统进行研究，建立了虚拟手术系统，实现了喉部声带肿物切除的手术仿真。
Based on laryngeal surgery with laryngoscope, a virtual surgery system is established and it can realize the simulation of vocal cord tumor cutting with force feedback.
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