International Journal on Magnetic Particle Imaging IJMPI
Vol. 11 No. 1 Suppl 1 (2025): Int J Mag Part Imag
https://doi.org/10.18416/IJMPI.2025.2503032

Proceedings Articles

An 101 kHz – narrowband magnetic particle imaging scanner

Main Article Content

Qifa Su (School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China), Shijie Sun (Hangzhou International Innovation Institute, Beihang University, Hangzhou, China), Lijun Xu (School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China), Jing Zhong (Hangzhou International Innovation Institute, Beihang University, Hangzhou, China)

Copyright (c) 2025 Qifa Su, Shijie Sun, Lijun Xu, Jing Zhong

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

Abstract

Magnetic particle imaging (MPI) is an emerging medical imaging modality for quantitatively visualizing the spatial distribution of superparamagnetic iron oxide nanoparticles (SPIONs). In this study, we develop a narrowband MPI scanner with an excitation frequency of 101 kHz. In x-direction, a solenoid coil is used to generate the 101 kHz ac magnetic field with amplitude of 4 mT for the SPIONs excitation. In y-direction, a saddle coil is used to generate a low-frequency ac magnetic field to scan a field free point. A gradiometric detection coil is used to only measure the 3rd harmonic at 303 kHz for the SPIONs visualization. Phantom experiments are performed with SynomagD-70 SPIONs. It indicates that reconstructed images have a spatial resolution of 1.5 mm and 1 mm for a gradient field of 0.56 T/m and 1.12 T/m in x- and y-direction, respectively

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