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MAGNETS: Magnetic Needle Tracking System

MAGNETS: Magnetic Needle Tracking System. Vladimir Sibinović¹, Bojana Petkovi ć ² , Goran Đorđević ¹ ¹ University of Niš, Faculty of Electronic Engineering ² University of applied sciences, Erfurt. Outline. Introduction System Interferences Symmetry Statistical analysis of data

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MAGNETS: Magnetic Needle Tracking System

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  1. MAGNETS:Magnetic Needle Tracking System Vladimir Sibinović¹, BojanaPetković², Goran Đorđević¹ ¹ University of Niš, Faculty of Electronic Engineering ² University of applied sciences, Erfurt

  2. Outline • Introduction • System • Interferences • Symmetry • Statistical analysis of data • Conclusion • Further work • References

  3. Introduction • Part of project II44004, HUMANISAM, which is financed by Serbian Ministry of Science • Percutaneous Vertebroplasty – PVP • Providing structural support for fractured and weaken vertebra • Design and realization of a system for magnetic tracking of the needle during PVP

  4. System • Based on Hall-effect sensors • Senis GmbH; Sentronis AD

  5. Magnet and needle • Axial polarization • Needle for PVP

  6. Interferences • Are there interferences from the presence of human body?

  7. Symmetry • Symmetry of data due to symmetry of the system • Can be an advantage in further development • Elimination of excess measurements • Substitution of the sensors

  8. Symmetry – graph

  9. Statistical analysis of data • Statistics gives the best view of a large data set • Mean, Standard deviation, Variance

  10. Boxplot

  11. Conclusion • We proven the hypothesis that the movement of the needle can be detected with Hall-effect • The system is precise, but the actual precision is yet to be determine • Data are consistent and repetitive • System is immune to the interferences that can accrue during the procedure

  12. Further work • Transformation of measured voltage values in to the position of the magnet, and with that the position of the needle • Combination with X-ray fluoroscopy • Determining the exact precision of the system

  13. References • K. Gary, L. Ibanez and S. Aylward, D. Gobbi, M. B. Blake and K. Cleary, “IGSTK: An Open Source Software Toolkit for Image-Guided Surgery,” IEEE Computer, April 2006. • S. M. Samani, M. Yazdi, M. H. Bagheri , “Automatic Identification of Needle’s Entrance Point and Angle in Vertebroplasty,” IEEE international Conference on Signal and Image Processing Applications, 2009. • Senis GmbH, http://senis.ch/new-tranducer_data_sheets.html • The MathWorks, Inc. MATLAB, www.mathworks.com • Wikipedia, http://www.wikipedia.org/

  14. Questions ? Thank you for your time

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