A New FDTD Method for the Study of MRI Pulsed Field Gradient-Induced Fields in the Human Body

Abstract

In modern MRI patients are exposed to strong rapidly switched magnetic field gradients that may be able to elicit nerve stimulation. This paper provides the numerical results of an investigation into induced current spatial distributions inside human tissue when exposed to these pulsed magnetic field gradients. Conventional FDTD methods are unable to model these effects as the effective frequencies of the input source are less than 100kHz or so relatively low for FDTD calculations. A new High Definition FDTD variant was developed to operate over this bandwidth and a number of body and gradient models are analysed using the new method.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA411134

Entities

People

  • Feng Liu
  • Huawei Zhao
  • Stuart Crozier

Organizations

  • University of Queensland

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Current Density
  • Dielectrics
  • Eddy Currents
  • Electromagnetic Fields
  • Frequency
  • Frequency Conversion
  • Human Body
  • Magnetic Fields
  • Magnetic Resonance
  • Magnetic Resonance Imaging
  • Materials
  • Parallel Computing
  • Parallel Processing
  • Radio Frequency
  • Spatial Distribution

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Fluid Dynamics.
  • Medical Imaging.