Initial imaging experiments with a direct-driven relaxation Magnetic Particle Imaging setup

Abstract

This contribution presents initial imaging experiments with a newly designed imaging setup that facilitates Magnetic Particle Imaging (MPI) by recording the step response of the tracer in contrast to its higher harmonic spectrum. Such a concept promises a greatly reduced complexity in hardware and enables a much simpler time-domain evaluation of the receive signals. The concept borrows from magnetorelaxometry (MRX) subjecting the tracer to a step change in excitation field to affect a relaxation of the particles’ magnetization. For that reason, all experience from MRX data evaluation and modeling of the magnetization response apply to the imaging variant as well. The hardware design of the system opens a great deal of flexibility regarding excitation patterns and signal evaluation for future experiments.

Int. J. Mag. Part. Imag. 6(2), Suppl. 1, 2020, Article ID: 2009060, DOI: 10.18416/IJMPI.2020.2009060