Int J Med Robot - A physics-based algorithm for real-time simulation of electrosurgery procedures in minimally invasive surgery.

Tópicos

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Resumo

CKGROUND: High-frequency electricity is used in the majority of surgical interventions. However, modern computer-based training and simulation systems rely on physically unrealistic models that fail to capture the interplay of the electrical, mechanical and thermal properties of biological tissue.METHODS: We present a real-time and physically realistic simulation of electrosurgery by modelling the electrical, thermal and mechanical properties as three iteratively solved finite element models. To provide subfinite-element graphical rendering of vaporized tissue, a dual-mesh dynamic triangulation algorithm based on isotherms is proposed. The block compressed row storage (BCRS) structure is shown to be critical in allowing computationally efficient changes in the tissue topology due to vaporization.RESULTS: We have demonstrated our physics-based electrosurgery cutting algorithm through various examples. Our matrix manipulation algorithms designed for topology changes have shown low computational cost.CONCLUSIONS: Our simulator offers substantially greater physical fidelity compared to previous simulators that use simple geometry-based heat characterization.

Resumo Limpo

ckground highfrequ electr use major surgic intervent howev modern computerbas train simul system reli physic unrealist model fail captur interplay electr mechan thermal properti biolog tissuemethod present realtim physic realist simul electrosurgeri model electr thermal mechan properti three iter solv finit element model provid subfiniteel graphic render vapor tissu dualmesh dynam triangul algorithm base isotherm propos block compress row storag bcrs structur shown critic allow comput effici chang tissu topolog due vaporizationresult demonstr physicsbas electrosurgeri cut algorithm various exampl matrix manipul algorithm design topolog chang shown low comput costconclus simul offer substanti greater physic fidel compar previous simul use simpl geometrybas heat character

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