magnets: magnetic needle tracking system
DESCRIPTION
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 PresentationTRANSCRIPT
MAGNETS:Magnetic Needle Tracking System
Vladimir Sibinović¹, Bojana Petković², Goran Đorđević¹
¹ University of Niš, Faculty of Electronic Engineering
² University of applied sciences, Erfurt
Outline Introduction System Interferences Symmetry Statistical analysis of data Conclusion Further work References
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
System Based on Hall-effect sensors Senis GmbH; Sentronis AD
Magnet and needle Axial polarization Needle for PVP
Interferences Are there interferences from the presence of
human body?
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
Symmetry – graph
Statistical analysis of data Statistics gives the best view of a large data
set
Mean, Standard deviation, VarianceSensor Channel Mean Std Var
1
X14.8107 0.4119 0.1696
Y-130.4028 0.3785 0.1433
Z1055.9012 0.3547 0.1258
Boxplot
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
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
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/
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