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Related Concept Videos

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Distorter Characterisation Using Mutual Inductance in Electromagnetic Tracking.

Herman Alexander Jaeger1, Pádraig Cantillon-Murphy2,3

  • 1Department of Electrical and Electronic Engineering, School of Engineering, University College Cork, Cork, Ireland. h.jaeger@umail.ucc.ie.

Sensors (Basel, Switzerland)
|September 15, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to detect magnetic distortions in electromagnetic tracking (EMT) using only the transmitter. This helps optimize placement and potentially reduce errors in surgical navigation and robotics.

Keywords:
distortionelectromagnetic trackingimage-guided interventionsmagneticsrobotics

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Area of Science:

  • Medical instrumentation
  • Electromagnetism
  • Surgical technology

Background:

  • Electromagnetic tracking (EMT) is crucial for surgical navigation, medical robotics, and virtual reality.
  • Magnetic distortions are the primary limitation of EMT, causing measurement errors.
  • Current error reduction techniques often require additional tracking hardware.

Purpose of the Study:

  • To develop a novel method for detecting static magnetic distortions using only the EMT transmitter.
  • To enable characterization of magnetic distorters without auxiliary hardware.
  • To facilitate optimized transmitter placement and potential material-specific error compensation.

Main Methods:

  • Modification of an existing transmitter design for simultaneous magnetic field transmission and reception.
  • Development of a mutual inductance model for the modified transmitter.
  • Analysis of deviations from control measurements to identify distorter characteristics.

Main Results:

  • The developed method can detect static magnetic distortions using only the transmitter array.
  • Deviations in mutual inductance measurements correlate with the location, magnitude, and material of field distorters.
  • The technique allows for characterization of distorter effects within the tracking volume.

Conclusions:

  • This method enables users to optimize EMT transmitter placement by characterizing magnetic distortions without extra hardware.
  • The ability to discriminate distorter properties may allow for material-specific error compensation techniques.
  • This advancement can improve the accuracy and reliability of EMT in clinical settings.