VR Haptics Paper Review

1. Haptics integration with 3D visualization techniques for dose planning in Stereo-tactic Radio surgery Pankaj Sharma(36921639) Proceedings of the Eighth International Conference on Information Visualization (IV’04) 1093-9547/04 “Reference : Ida Olofsson ReachIn Technologies Sweden, Karljohan Linkoping Univeristy Sweden”

4. About GammaKnife http://www.elekta.com/patient_international_gamma_knife_surgery.php Leksell Gamma Knife is the tool that allows the doctor to precisely pinpoint the tumor - is the special stereotactic head frame.

6. Mechanical isocenter: is the point where optical beams intersectIso-Center

8. Mechanical isocenter: is the point where optical beams intersectIso-Center

9. The dose planner task is to fill the target volume with irrdationiso-centers in such a way that sufficient level of irradiation is achieved.

11. Stereo display

12. 6 dof mouse

14. Real time 3D visualization of both the tissue data & currently defined irradiation field. Interactive placement & subsequent adjustment of irradiation iso-centers using haptic device. Haptic interaction with the dose distribution generated from the previously placed iso-centers for getting optimal positions. Use of haptic 3D menu to provide an integrated planning. Haptics Interaction with 3D visualisation

15. The placement of iso-centers give rise to a dose distribution , the evolution of the dose distribution ,is continuously visualized through an iso-dose surface. Dose Visualization

16. Haptic interaction provides means of achieving full 3D local representation of these variations Haptic feedback present the dose distribution to the user It also provides feedback to guide user to place iso-centers at best Advantages position Haptic Feedback

17. A target guiding force feedback, not to force but to guide the user to put iso-centres in a position inside the target and not too close to the target wall. A dosage guiding force feedback that leads the user away from areas where higher dosage has already been applied. This helps to find the potential minima of the field inside the target volume. Haptic Feedback Criteria

18. Thank you