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

[1] Weizenecker, Jürgen & Gleich, Bernhard & Borgert, Joern. (2008). Magnetic particle imaging using a field free line. Journal of Physics D: Applied Physics. 41. 105009-. 10.1088/0022-3727/41/10/105009.
[2] Saritas, Emine & Goodwill, Patrick & Zhang, George & Conolly, Steven. (2013). Magnetostimulation Limits in Magnetic Particle Imaging. IEEE transactions on medical imaging. 32. 10.1109/TMI.2013.2260764.
[3] P. Lövsund, P. Å. Öberg and S. E. G. Nilsson. (1979). Quantitative determination of thresholds of magnetophosphenes. Radio Science, vol. 14, no. 6S, pp. 199-200, Nov.-Dec. 1979, doi: 10.1029/RS014i06Sp00199.
[4] Mason, Erica Ellis. (2020). Magnetic particle imaging for intraoperative breast cancer margin assessment and functional brain imaging. (Doctoral dissertation, Harvard-MIT Program in Health Sciences and Technology).
[5] Magnetic Resonance Physics and Instrumentation Group. Open-Source Magnetic Particle Imaging. Retrieved December 12, 2021, from https://os-mpi.github.io/.
[6] D. C. Meeker, Finite Element Method Magnetics, Version 4.2 (21Feb2019 Build), https://www.femm.info
[7] Zigrang, D. J., and Sylvester, N. D. (June 1, 1985). "A Review of Explicit Friction Factor Equations." ASME. J. Energy Resour. Technol. June 1985; 107(2): 280–283. https://doi.org/10.1115/1.3231190

Most read articles by the same author(s)

Konstantin Herb, Erica Mason, Eli Mattingly, Joseph Mandeville, Emiri Mandeville, Clarissa Cooley, Lawrence Wald, Functional MPI (fMPI) of hypercapnia in rodent brain with MPI time-series imaging , International Journal on Magnetic Particle Imaging IJMPI: Vol. 6 No. 2 Suppl 1 (2020)
Eli Mattingly, Erica Mason, Konstantin Herb, Monika Śliwiak, Katrin Brandt, Clarissa Cooley, Lawrence Wald, OS-MPI: an open-source magnetic particle imaging project , International Journal on Magnetic Particle Imaging IJMPI: Vol. 6 No. 2 Suppl 1 (2020)
Eli Mattingly, Erica Mason, Konstantin Herb, Monika Śliwiak, John Drago, Matthias Graeser, Lawrence Wald, A sensitive, stable, continuously rotating FFL MPI system for functional imaging of the rat brain , International Journal on Magnetic Particle Imaging IJMPI: Vol. 8 No. 2 (2022)
Eli Mattingly, Monika Śliwiak, John Drago, Erica Mason, Matthias Graeser, Lawrence Wald, A drive filter design for MPI with harmonic notching and selective damping , International Journal on Magnetic Particle Imaging IJMPI: Vol. 8 No. 1 Suppl 1 (2022)
Eli Mattingly, Erica Mason, Monika Sliwiak, Lawrence L Wald, Drive and receive coil design for a human-scale MPI system , International Journal on Magnetic Particle Imaging IJMPI: Vol. 8 No. 1 Suppl 1 (2022)
Erica Mason, Eli Mattingly, Konstantin Herb, Sofia Franconi, Monika Sliwiak, Clarissa Cooley, Lawrence Wald, Magnetic Particle Imaging for intraoperative margin analysis in breast-conserving surgery , International Journal on Magnetic Particle Imaging IJMPI: Vol. 6 No. 2 Suppl 1 (2020)
Eli Mattingly, Monika Sliwiak, Jorge Chacon-Caldera, Alex Barksdale, Frauke Niebel, Erica Mason, Lawrence Wald, A Human-Scale Magnetic Particle Imaging System for Functional Neuroimaging , International Journal on Magnetic Particle Imaging IJMPI: Vol. 10 No. 1 Suppl 1 (2024)
Erica E Mason, Elliott Barcikowski, John Carl, Mike Chandeeing, Bryanna Davison, Benjamin Fellows, Walter Fetsch, Kyle Fields, Joan Greve, Justin J Konkle, Eli Mattingly, Toby Sanders, Olivia Sehl, David Trease, Ashley Truxal, Marcela Weyhmiller, Patrick W Goodwill, Preliminary Results: Large Bore Clinical MPI System Imaging Human Head-sized FOVs , International Journal on Magnetic Particle Imaging IJMPI: Vol. 10 No. 1 Suppl 1 (2024)
Erica Ellis Mason, Stephen F. Cauley, Eli Mattingly, Monika Sliwiak, Lawrence L. Wald, Side Lobe Informed Center Extraction (SLICE): a projection-space forward model reconstruction for a 2D imaging system , International Journal on Magnetic Particle Imaging IJMPI: Vol. 8 No. 1 Suppl 1 (2022)
John M. Drago, Erica E. Mason, Eli Mattingly, Monika Śliwiak, Lawrence L. Wald, Image Time-Series Stability for MPI-Based Functional Neuroimaging , International Journal on Magnetic Particle Imaging IJMPI: Vol. 8 No. 1 Suppl 1 (2022)

1 2 > >>

International Journal on Magnetic Particle Imaging IJMPI

Main Article Content

Abstract

Article Details

References

Most read articles by the same author(s)