Modeling the magnetization dynamics for large ensembles of immobilized magnetic nanoparticles in multi-dimensional magnetic particle imaging
Hannes Albers,Tobias Knopp,Tobias Knopp,Martin Möddel,Martin Möddel,Marija Boberg,Marija Boberg,Tobias Kluth,Tobias Kluth +8 more
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TLDR
In this paper, a model-based approach where the magnetization response is simulated by a Neel rotation model for the particle's magnetic moments and the ensemble magnetization is obtained by solving a Fokker-Planck equation approach is presented.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 2022-02-01 and is currently open access. It has received 1 citations till now. The article focuses on the topics: Magnetization & Magnetic particle imaging.read more
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On the Receive Path Calibration of Magnetic Particle Imaging Systems
TL;DR: In this article , a general multi-channel calibration procedure for inductive receive paths in magnetic particle imaging (MPI) and a blueprint to investigate model and method uncertainties is provided. And the calibration procedure is generalized to also cover nonorthogonal and nonhomogeneous receive coils.
References
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Model uncertainty in magnetic particle imaging: Nonlinear problem formulation and model-based sparse reconstruction
Tobias Kluth,Peter Maass +1 more
TL;DR: In this article, a total least squares approach is used to simultaneously reconstruct the tracer concentration and deviations in the system matrix, and reconstructions are obtained from publicly available data by minimizing a Tikhonov-type functional.
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Using Low-Rank Tensors for the Recovery of MPI System Matrices
TL;DR: This work demonstrates that the rows of the system matrix allow a representation as low-rank tensors, and develops a new matrix recovery method exploiting aforementioned low rank property in addition to sparsity in the DCT domain.
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Towards Accurate Modeling of the Multidimensional Magnetic Particle Imaging Physics
TL;DR: In this article, a physical model that is based on Neel rotation for large particle ensembles was proposed to describe measured 2D MPI data with much higher precision than state-of-the-art MPI models.
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Effect of easy axis alignment on dynamic magnetization of immobilized and suspended magnetic nanoparticles
TL;DR: It is found that the easy axis alignment of MNPs considerably affects their M–H curve and harmonic spectra, which indicates the importance of this alignment for their biomedical applications.
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The effect of Neel relaxation on the properties of the third harmonic signal of magnetic nanoparticles for use in narrow-band magnetic nanoparticle imaging
TL;DR: In this article, the authors measured the properties of the third harmonic signal of magnetic nanoparticles, such as frequency and magnetic field dependencies, when the behavior of MNPs was dominated by Neel relaxation.