System function analysis of MPI with Field-Free Line and excitation coil configurations

2025/03/14 by Washino, Masaomi, Nomura, Kota, Matsuda, Tetsuya +3
#FFL MPI #Field Free Line #Stream functions #System Matrix

paper · doi:10.18416/ijmpi.2025.2503014

Abstract

Magnetic Particle Imaging (MPI) visualizes the distribution of magnetic particles using their nonlinear magnetization response. This study evaluated the impact of interference between the Field-Free Line (FFL) and alternating excitation field on system performance. The Coaxial Configuration suppressed interference and provided stable in-phase signals, while the Orthogonal Configuration produced anti-phase signals, reducing sensitivity. The Coaxial Configuration is suitable for wide-area measurements, whereas the Orthogonal Configuration offers high resolution but faces sensitivity challenges.

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