肝脏虚拟外科手术切口的渲染

Rendering of virtual surgical incision in liver

虚拟外科手术电脑模拟的特点是手术器官表面切口的视觉呈现,而这种呈现通常具有最小的可视化范围,因此对切口模型高真实感呈现提出了较高要求。本文通过实时生成新的虚拟手术切口的几何图形和纹理图,研究了模拟和渲染肝脏虚拟手术切口的可行性。用于表面可视化的切口纹理在运行时生成以提高实时性能,并提出一种扩展的次表面散射方法,以便切口周围区域局部变色自然。该方法完成切割到切口真实感呈现约在150毫秒以内,可以增加在实时应用中虚拟手术切口的高真实感。

Computer simulation of virtual surgery is characterized by the visual presentation of the incision on the surface of the surgical organ,which usually has the minimum visual range.Therefore,high realistic presentation of the incision model is required.In this paper,the feasibility of rendering a simulation and visual incision model is studied by generating new geometric figures and texture maps in real time.The cut wound texture for surface visualization is generated at runtime to improve real-time performance and an extended subsurface scattering method is proposed to allow local discoloration to occur naturally in the area around the incision.This method completes the generating of incision model to high realistic presentation of the incision in less than 150 milliseconds,which can increase the realistic rendering of virtual incision in real-time application.