International Journal on Magnetic Particle Imaging IJMPI
Vol. 8 No. 1 Suppl 1 (2022): Int J Mag Part Imag
https://doi.org/10.18416/IJMPI.2022.2203021

Proceedings Articles

Role of Phase Encoding in Pulsed Magnetic Particle Imaging

Main Article Content

Fabian Mohn (University Medical Center Hamburg-Eppendorf, Germany), Tobias Knopp (Section for Biomedical Imaging, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute for Biomedical Imaging, Hamburg University of Technology, Hamburg, Germany), Matthias Graeser (Section for Biomedical Imaging, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute for Biomedical Imaging, Hamburg University of Technology, Hamburg, Germany; Fraunhofer Research Institute for Individualized and Cell-based Medicine, Lübeck, Germany; Institute for Medical Engineering, University of Lübeck, Lübeck, Germany)

Copyright (c) 2022 Fabian Mohn, Tobias Knopp, Matthias Graeser

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Non-sinusoidal excitation waveforms have the ability to improve the signal-to-noise ratio and image resolution under certain conditions. Yet, the ability to use phase information for spatial encoding is expected to diminish as sharp pulses lead to concurrent signal response due to steep slopes and therefore less phase information. This motivates investigations into alternate sampling approaches that mitigate a loss in spatial encoding. However, measurements and image reconstruction results indicate that 10 times faster slew rates compared to sine excitation lead to enough phase information to resolve basic features using system matrix reconstruction.

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