微创手术过程中的手术烟雾仿真

Physics-based simulation of surgical smoke during minimally invasive surgery

摘要:

手术烟雾是微创手术过程中对患者和医师健康产生危害的重要来源，也是手术风险控制中的重要环节。现阶段对这一复杂流体现象的仿真在精确性和可交互性等方面都有一定局限。通过改进的涡粒子方法将传统的流体模型与基于无网格的算法相结合，实现了面向微创消融术的手术烟雾仿真。该方法将传统模型在计算烟雾流体时因数值耗散而丢失的流体细节以涡量约束力的形式重新耦合进流体方程中，实现了对包括小尺度涡在内的流体细节的还原。同时通过GPU并行加速的方法和基于患者医学图片重建的三维模型实现了可交互式的仿真。仿真结果展现了较高的真实性和流体细节，实现了良好的计算优化及程序拓展性，为未来应用中的手术规划及训练奠定了基础。

Abstract:

Surgical smoke generated during the minimally invasive surgery is normally regarded as an important aspect of surgical risk which could produce potential health problems for both clinicians and patients. Current researches in the area of surgical smoke simulation have limitations with regards to both accuracy and interactivity. In this paper, a novel approach based on the vortex particle method which combines the conventional fluid model and the meshfree method has been proposed. This method reconstructs the lost information during the simulation due to numerical dissipations by using a vorticity confinement force, and hence, successfully recovers the fluidic details including small-scale vorticities. GPU acceleration and image reconstruction based on medical images have also been employed to produce a patient-specific simulation. The results have shown to be high realistic and accurate, computational optimization and extensibility have also been achieved. Therefore, such simulation can be used in potential applications including surgical training and planning.