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WebSTer: A Web-based Surgical Training System

WebSTer: A Web-based Surgical Training System. School of Computer Studies University of Leeds Nuha El-Khalili, Ken Brodlie and David Kessel. http://www.scs.leeds.ac.uk/vis/nuha/AAA/. Another Minimally Invasive Surgical (MIS) application But, on the World Wide Web (WWW) Why the web ?

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WebSTer: A Web-based Surgical Training System

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  1. WebSTer: A Web-based Surgical Training System School of Computer Studies University of Leeds Nuha El-Khalili, Ken Brodlie and David Kessel http://www.scs.leeds.ac.uk/vis/nuha/AAA/

  2. Another Minimally Invasive Surgical (MIS) application • But, on the World Wide Web (WWW) • Why the web ? • What is the problem? • What is the proposed solution? • Evaluation of the solution. • What have we learned? • Conclusion MMVR 2000

  3. MIS needs new training methods. VR solutions are expensive, hardware dedicated and limited in collaboration. Web-based applications are accessible, portable and affordable. Why the web? MMVR 2000

  4. What is the problem? • Training radiologists on Abdominal Aortic Aneurysm (AAA). MMVR 2000

  5. Training skills • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  6. WebSTer is the solution • Background training • Procedure steps • Captured movies • Other information • Practical training environment • Model anatomy in 3D. • Simulate surgical tool behavior. • Special input/output devices. MMVR 2000

  7. Physically-based modelling Java application Server Socket interface Virtual interface Java applet Socket interface Client WebSTer - training simulator Internet TCP/IP MMVR 2000

  8. WebSTer- User Interface MMVR 2000

  9. WebSTer features • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  10. WebSTer features • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  11. WebSTer features • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  12. WebSTer features • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  13. WebSTer features • Representational skill • Procedural and automated skills • Decision making • Manoeuvring the surgical tools • Force perception • Eye/hand co-ordination MMVR 2000

  14. Evaluation of WebSTer • Subjective questionnaire- results: • Background training web pages: focus on audience • Interactive CT display: good for non-radiologist • Decision making form: useful techniques, use for other decisions • Visual feedback: not achieving the goal • Tool simulation: not realistic or interactive enough MMVR 2000

  15. What have we learned? • VRML suffers from limitations. • Web technologies do not support non-standard I/O devices efficiently. • In training, realism is more important than accuracy. MMVR 2000

  16. Conclusion • Training on the WWW is advantageous. • Current technology supports prototype training applications. • Technology development is exponential. • How much realism vs accuracy is needed? MMVR 2000

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