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Noise analysis for multi-slice radio frequency current density imaging.

Dinghui Wang1, Tim P DeMonte, Michael L Joy

  • 1Dept. of Electr. & Comput. Eng., Toronto Univ., Ont. M5S 3G9 Canada. dinghui.wang@utoronto.ca

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|October 20, 2007
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Radio frequency current density imaging (RF-CDI) measures current density using MRI. This study quantifies MRI noise impact on multi-slice RF-CDI sensitivity, deriving and verifying a current noise formula.

Area of Science:

  • Biomedical Engineering
  • Medical Imaging Physics

Background:

  • Radio frequency current density imaging (RF-CDI) uses magnetic resonance imaging (MRI) to measure current density at the Larmor frequency.
  • The development of multi-slice RF-CDI has improved imaging capabilities for various biomedical applications.

Purpose of the Study:

  • To investigate the impact of random noise from MRI on the sensitivity of multi-slice RF-CDI measurements.
  • To derive and validate a formula for current noise in multi-slice RF-CDI.

Main Methods:

  • A 3-D finite-difference time-domain (FDTD) model was used to simulate electromagnetic fields.
  • The derived current noise formula was verified through both numerical simulations and phantom experiments.

Main Results:

Related Experiment Videos

  • The study successfully derived a formula quantifying current noise in multi-slice RF-CDI.
  • Both simulation and phantom experiments confirmed the accuracy of the derived noise formula.

Conclusions:

  • MRI random noise significantly influences the sensitivity of multi-slice RF-CDI.
  • The validated current noise formula provides a crucial tool for assessing and improving RF-CDI measurement sensitivity.