Rapid TAURUS for Relaxation-Based Color Magnetic Particle Imaging
M. Tun\c{c} Arslan, A. Alper \"Ozaslan, Semih Kurt, Yavuz Muslu, and, Emine Ulku Saritas

TL;DR
This paper introduces a rapid, calibration-free method for relaxation-based color MPI called TAURUS, which is enhanced to work with fast, multi-dimensional trajectories by correcting mirror symmetry distortions, enabling quicker imaging.
Contribution
The paper presents a novel technique to improve TAURUS, allowing it to estimate relaxation maps efficiently during rapid, multi-dimensional MPI trajectories.
Findings
Successfully estimates high-fidelity relaxation maps in simulations and experiments.
Achieves orders of magnitude reduction in scanning time.
Maintains calibration-free property of the original TAURUS method.
Abstract
Magnetic particle imaging (MPI) is a rapidly developing medical imaging modality that exploits the non-linear response of magnetic nanoparticles (MNPs). Color MPI widens the functionality of MPI, empowering it with the capability to distinguish different MNPs and/or MNP environments. The system function approach for color MPI relies on extensive calibrations that capture the differences in the harmonic responses of the MNPs. An alternative calibration-free x-space-based method called TAURUS estimates a map of the relaxation time constant, by recovering the underlying mirror symmetry in the MPI signal. However, TAURUS requires a back and forth scanning of a given region, restricting its usage to slow trajectories with constant or piecewise constant focus fields (FFs). In this work, we propose a novel technique to increase the performance of TAURUS and enable map estimation for…
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Taxonomy
TopicsCharacterization and Applications of Magnetic Nanoparticles · Geomagnetism and Paleomagnetism Studies · Magnetic properties of thin films
