Shift coil assembly for a rotating permanent magnet FFL human-scale fMPI imager

Alex Barksdale; Erica Mason; Eli Mattingly; Monika Sliwiak; John Drago; Lawrence Wald

doi:10.18416/IJMPI.2022.2203067

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.2022.2203067

Proceedings Articles

Shift coil assembly for a rotating permanent magnet FFL human-scale fMPI imager

Alex Barksdale (MIT), Erica Mason , Eli Mattingly , Monika Sliwiak , John Drago , Lawrence Wald

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

Abstract

We present the fabrication and characterization of a shift coil assembly designed for a rotating permanent magnet FFL human fMPI imager. The realized system consists of two sets of inner and outer coils (“racetracks”), each driven by an independent amplifier. Hollow conductors and a highly parallel water-cooling circuit provide heat removal during operation. The measured electrical characteristics of the coils (R_inner = 310 mOhms, L_inner = 26 mH, R_outer = 399 mOhms, L_outer=41 mH, M = 22.6 mH) match simulated values well, and field efficiency measurements demonstrate ability to shift a 1.03 T/m FFL over a 20 cm FOV within driving capabilities of the amplifier system (field efficiency = 0.215 mT/A).

References

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