MAGNETS: Magnetic Needle Tracking System

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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 - PowerPoint PPT Presentation

Text of MAGNETS: Magnetic Needle Tracking System

  • MAGNETS:Magnetic Needle Tracking SystemVladimir Sibinovi, Bojana Petkovi, Goran orevi University of Ni, Faculty of Electronic Engineering University of applied sciences, Erfurt

  • OutlineIntroductionSystemInterferencesSymmetryStatistical analysis of dataConclusionFurther workReferences

  • IntroductionPart 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

  • SystemBased on Hall-effect sensorsSenis GmbH; Sentronis AD

  • Magnet and needleAxial polarizationNeedle for PVP

  • InterferencesAre there interferences from the presence of human body?

  • SymmetrySymmetry of data due to symmetry of the system

    Can be an advantage in further development

    Elimination of excess measurements

    Substitution of the sensors

  • Symmetry graph

  • Statistical analysis of dataStatistics gives the best view of a large data set

    Mean, Standard deviation, Variance

    SensorChannelMeanStdVar1X14.81070.41190.1696Y-130.40280.37850.1433Z1055.90120.35470.1258

  • Boxplot

  • ConclusionWe 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

  • Further workTransformation 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

  • ReferencesK. 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 Needles 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.htmlThe MathWorks, Inc. MATLAB, www.mathworks.comWikipedia, http://www.wikipedia.org/

  • Questions ?Thank you for your time

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