Title :
Large tip solution to dynamic Langevin equation for MPI
Author :
Price, D.A. ; Croft, L.R. ; Saritas, E.U. ; Goodwill, P.W. ; Conolly, S.M.
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of California Berkeley, Berkeley, CA, USA
Abstract :
Here our large-angle physical model of the Langevin equation with magneto-viscous relaxation has been found to agree quite well with the results of a Monte Carlo simulation for dynamic particle behavior in a magnetic field. Furthermore, the magneto-viscous relaxation time constant predicted through this model has been shown to agree with experimental data. Such a model to describe magneto-viscous relaxation effects is important because it allows an optimized selection of magnetic excitation strengths, excitation waveform, and nanoparticle properties. Furthermore, a better understanding of magneto-viscous relaxation may allow the option of deconvolving its effect from the final image to achieve to improve spatial resolution.
Keywords :
Monte Carlo methods; biomagnetism; biomedical MRI; image resolution; magnetic particles; magnetic relaxation; medical image processing; nanomagnetics; nanoparticles; viscosity; Monte Carlo simulation; dynamic Langevin equation; dynamic particle behavior; excitation waveform; final image effects; large tip solution; large-angle physical model; magnetic excitation strengths; magnetic field; magnetic particle imaging; magneto-viscous relaxation time constant; nanoparticle properties; spatial resolution; Equations; Magnetic resonance imaging; Magnetostatic waves; Magnetostatics; Mathematical model; Saturation magnetization;
Conference_Titel :
Magnetic Particle Imaging (IWMPI), 2013 International Workshop on
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-5520-9
Electronic_ISBN :
978-1-4673-5521-6
DOI :
10.1109/IWMPI.2013.6528385
