International Journal on Magnetic Particle Imaging IJMPI
Vol. 9 No. 1 Suppl 1 (2023): Int J Mag Part Imag

Proceedings Articles

Model-based voltage predictions for arbitrary waveform excitation in Magnetic Particle Imaging

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Justin Ackers (Fraunhofer-Einrichtung für Individualisierte und Zellbasierte Medizintechnik IMTE), Fabian Mohn , Niklas Hackelberg , Tobias Knopp , Thorsten M. Buzug , Matthias Graeser 


In recent works, arbitrary waveform or pulsed excitation in Magnetic Particle Imaging (MPI) was proposed to offer better resolution and sensitivity. Generating these excitation fields poses a new challenge in MPI hardware design. This work proposes a method which models the excitation chain as a linear system and predicts the required input voltage for the desired output field. The initial prediction is then iteratively improved to compensate for inaccuracies of the model. The method is demonstrated to achieve accurate field waveforms in both linear and slew rate limited regions of the amplifier.

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