Output details

A fast hybrid computation model for rectum deformation

Originality - This work provides a solution of fast and realistic graphical simulation of slender objects undergoing large deformation, specially tailored for virtual reality based simulator that allows trainee doctors to master their skills by operating on a virtual patient. It overcomes the drawback of being computationally intensive which classic approaches (such as the finite element method) suffer and delivers real time interactions with high fidelity. The method models the anatomic and mechanical structure of the bowel by incorporating cutting edge graphical technologies into a fast collision handling and powerful deformation engine.

Rigour - The work is based on our on-going research on deformable object animation which over the last two decades has included over 60 publications. We have evaluated our model with a series of well-designed numerical experiments: this testing and in particular the feedback from consulting surgeons have concluded that our method is both accurate and fast. Later, a beta testing of our simulator has further confirmed our conclusions. Our results compare favourably against the state-of-the-art.

Significance - This work sets a theoretical framework and practical examples for modelling soft tissues like intestines. In partnership with consultant surgeons of Bournemouth and Poole hospitals, we have used the technology in a prototype simulator for virtual rectum surgery, which is able to provide safer and more cost-effective training for trainee surgeons. The realism of graphical representation, the sensation of force (haptic feedback) and the dynamic response of soft tissues in deformation are critical to this type of simulator. Our work satisfactorily handles these challenges. This research forms part of the Augery project partially funded by NHS Bournemouth Trust (£25,000, Zhang)