Towards physics-based interactive simulation of electrocautery procedures using PhysX

Zhonghua Lu, Ganesh Sankaranarayanan, Dhanannjay Deo, Dingfang Chen, Suvranu De

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Haptic enabled virtual reality surgical simulators are increasingly replacing more traditional training tools in teaching hospitals. Development of these simulators may be greatly facilitated using physics libraries such as NVIDIA's PhysX. While volumetric models of soft bodies may be easily generated and simulated using such engines, it is not straightforward to develop complex surgical tasks such as surgical cutting and hence novel algorithms are necessary. Electrocautery is a tissue cutting process used in surgery to burn away soft tissues by localized heating using a specialized probe. Unlike typical surgical cutting with sharp instruments, the electrocautery process depends upon the duration of the tool tissue contact and the rate of heat conduction. The simulation of electrocautery depends on understanding the physics of heat conduction as well as empirical measurements of temperature in the tissue. In this paper we report a physics-based paradigm for the simulation of electrocautery procedures that can directly work on volumetric objects. Based on the solution characteristics of the conduction equation and empirical observations using a thermal imaging camera, we manipulate only the tetrahedral mesh vertices that are inside a sphere of influence whose centre is located at the tip of the electrocautery tool and which expands as a function of time. A 3D orthogonal plane is used to split the tetrahedral mesh vertices along the three Cartesian directions. Examples are provided from a realistic surgical simulation environment.

Original languageEnglish (US)
Title of host publication2010 IEEE Haptics Symposium, HAPTICS 2010
Pages515-518
Number of pages4
DOIs
StatePublished - 2010
Externally publishedYes
Event2010 IEEE Haptics Symposium, HAPTICS 2010 - Waltham, MA, United States
Duration: Mar 25 2010Mar 26 2010

Publication series

Name2010 IEEE Haptics Symposium, HAPTICS 2010

Conference

Conference2010 IEEE Haptics Symposium, HAPTICS 2010
Country/TerritoryUnited States
CityWaltham, MA
Period3/25/103/26/10

Keywords

  • Date rearrange
  • Electrocauterization simulation
  • H.5.2 [information interfaces and presentation]: user interfaces - haptic I/O
  • Haptic rendering
  • I.3.7 [computer graphics]: three-dimensional graphics and realism animation and virtual reality
  • PhysX engine

ASJC Scopus subject areas

  • Artificial Intelligence
  • Human-Computer Interaction

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