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MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
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Accelerating the co-simulation method for the design of transmit array coils for MRI.

Alireza Sadeghi-Tarakameh1,2, Ehsan Kazemivalipour1,2, Umut Gundogdu2

  • 1Department of Electrical and Electronics Engineering, Bilkent University, 06800, Ankara, Turkey.

Magma (New York, N.Y.)
|June 29, 2020
PubMed
Summary

This study accelerates transmit array (TxArray) coil design using equivalent circuit models with co-simulation. This novel approach significantly speeds up the optimization process for faster, more accurate coil development.

Keywords:
Co-simulationEquivalent circuit modelInductor calculationsMRITransmit array

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Area of Science:

  • Magnetic Resonance Imaging (MRI) hardware development
  • Electromagnetics and RF coil design

Background:

  • Co-simulation methods reduce complexity in transmit array (TxArray) coil design.
  • TxArray coil optimization is challenging due to numerous local minima.

Purpose of the Study:

  • To accelerate the co-simulation method for TxArray coil design.
  • To utilize equivalent circuit models for improved optimization initial guesses.

Main Methods:

  • An equivalent circuit model of the TxArray coil was used to provide an initial guess for co-simulation optimization.
  • Investigated six TxArray coils (three degenerate birdcage coils, two dual-row head coils, one elliptical body TxArray coil) with two loading strategies at 3T.
  • Constructed an eight-channel head-degenerate birdcage coil as an example.

Main Results:

  • The proposed method accelerates the design process more than 20-fold for the investigated coils.
  • Demonstrated a significant speed-up in the optimization of TxArray coils.

Conclusions:

  • A fast and accurate method for tuning and decoupling TxArray coils is achieved.
  • Combining equivalent circuit models with co-simulation enhances TxArray coil design efficiency.