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Related Concept Videos

Applications of EMF Measurements01:26

Applications of EMF Measurements

Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and the equilibrium...
Electromagnetic Fields01:30

Electromagnetic Fields

Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of Gauss's...

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Related Experiment Video

Updated: Jun 23, 2026

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation
10:25

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation

Published on: September 2, 2025

Electromagnetic tracking in the clinical environment.

Ziv Yaniv1, Emmanuel Wilson, David Lindisch

  • 1Imaging Science and Information Systems Center, Department of Radiology, Georgetown University Medical Center, Washington, DC 20057, USA. zivy@isis.georgetown.edu

Medical Physics
|April 22, 2009
PubMed
Summary
This summary is machine-generated.

Choosing an electromagnetic tracking system (EMTS) requires considering multiple factors beyond accuracy. No single EMTS configuration currently offers a comprehensive solution for all clinical procedures and environments.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Surgical Navigation

Background:

  • Electromagnetic tracking systems (EMTS) are crucial for image-guided procedures.
  • Previous studies focused mainly on EMTS accuracy and susceptibility to ferromagnetic interference.
  • A comprehensive evaluation of EMTS utility in clinical settings is needed.

Purpose of the Study:

  • To analyze factors influencing the clinical utility of EMTS beyond accuracy.
  • To assess EMTS performance across diverse clinical environments.
  • To evaluate commercial EMTS for image-guided procedures.

Main Methods:

  • Evaluated two commercial EMTS: Northern Digital Inc.'s Aurora and Ascension Technology Corp.'s 3D Guidance system.
  • Assessed systems based on refresh rate, sensor count, navigated region size, environmental interaction, sensor embeddability, and transformation data.
  • Tested systems in three distinct clinical environments.

Main Results:

  • EMTS performance varies significantly with specific procedures and clinical environments.
  • No single EMTS configuration provides a universal solution for all applications.
  • Factors such as refresh rate and environmental interaction critically impact clinical utility.

Conclusions:

  • The choice of EMTS must be tailored to specific clinical needs and environments.
  • Further research is needed to develop comprehensive EMTS solutions.
  • Optimizing EMTS for diverse clinical applications requires considering a wider range of performance factors.