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MAGNETS: Magnetic Needle Tracking System Vladimir Sibinović¹, Bojana Petković², Goran Đor đ ević¹ ¹ University of Niš, Faculty of Electronic Engineering.

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Presentation on theme: "MAGNETS: Magnetic Needle Tracking System Vladimir Sibinović¹, Bojana Petković², Goran Đor đ ević¹ ¹ University of Niš, Faculty of Electronic Engineering."— Presentation transcript:

1 MAGNETS: Magnetic Needle Tracking System Vladimir Sibinović¹, Bojana Petković², Goran Đor đ ević¹ 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 SensorChannelMeanStdVar 1 X 14.81070.41190.1696 Y -130.40280.37850.1433 Z 1055.90120.35470.1258

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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