Abstract #0355

Fast Full-Wave Calculation of Electromagnetic Fields for MRI Applications Based on Weak-Form Volume Integral Equation (VIE)

Wan Luo^1,2, Shao Ying Huang¹, Jiasheng Su¹, Zu-Hui Ma¹, and J. Thomas Vaughan³

¹Singapore University of Technology and Design, Singapore, Singapore, ²University of Electronic Science and Technology of China, Chengdu, China, People's Republic of, ³University of Minnesota, Minneapolis, MN, United States

When B₀ in a MRI system increases, peaks and nulls are formed in the energy/field distribution inside the subject under scan, which causes safety issues and deteriorates imaging accuracy, respectively. Therefore, a quick and accurate electromagnetic simulation of the human body is crucial for predicting the temperature and specific absorption rate distribution before a scan. Here, we develop a solver based on the weak-form volume integral equation (VIE) and accelerated by the fast Fourier transform method. It requires much less CPU time and memory compared with the traditional strong-form VIE and the popular FDTD-based commercial software SEMCAD.

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