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Fast Electromagnetic Analysis of MRI Transmit RF Coils Based on Accelerated Integral Equation Methods
IEEE Transactions on Bio-Medical Engineering
|January 27, 2016
Summary
A new electromagnetic simulation method speeds up MRI coil analysis by over 150x using precomputed magnetic resonance Green functions (MRGFs). This allows for faster, comprehensive coil design evaluation with high accuracy.
Area of Science:
- Medical Imaging
- Electromagnetics
- Computational Physics
Background:
- Magnetic Resonance Imaging (MRI) coil design requires accurate electromagnetic simulations.
- Current simulation methods can be computationally intensive, limiting design exploration.
Purpose of the Study:
- To introduce a fast frequency domain full-wave electromagnetic simulation method for MRI coils.
- To accelerate the analysis of MRI coils interacting with realistic human body models.
Main Methods:
- Integral equation methods decomposed into RF coil and human body domains.
- Precomputation of magnetic resonance Green functions (MRGFs) for body models.
- Reusing MRGFs with integral equation solvers for various coil designs.
Main Results:
- Achieved a speed-up of over 150 folds for full-wave electromagnetic problems.
- Maintained root mean square errors below 0.4% compared to unaccelerated methods.
- Enabled fast analysis of port S-parameters and electromagnetic field distribution.
Conclusions:
- The developed method significantly accelerates MRI coil design analysis.
- Facilitates comprehensive characterization of multiple RF coil designs.
- Paves the way for automatic optimization of MRI transmit and receive arrays.
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