Slew-rate dependence of tracer magnetization response in magnetic particle imaging

Please use this identifier to cite or link to this item: http://digitalrepository.fccollege.edu.pk/handle/123456789/108

Title:	Slew-rate dependence of tracer magnetization response in magnetic particle imaging
Authors:	Shah, Saqlain Abbas Ferguson, R. M. Krishnan, Kannan M
Keywords:	Physics
Issue Date:	2014
Publisher:	AIP
Series/Report no.:	Vol: 116-16;163910-8
Description:	Magnetic Particle Imaging (MPI) is a new biomedical imaging technique that produces real- time, high-resolution tomographic images of superparamagnetic iron oxide nanoparticle tracers. Currently, 25 kHz and 20 mT/μ0 excitation fields are common in MPI, but lower field amplitudes may be necessary for patient safety in future designs. Here, we address fundamental questions about MPI tracer magnetization dynamics and predict tracer performance in future scanners that employ new combinations of excitation field amplitude (Ho) and frequency (ω). Using an optimized, monodisperse MPI tracer, we studied how several combinations of drive field frequencies and amplitudes affect the tracer's response, using Magnetic Particle Spectrometry and AC hysteresis, for drive field conditions at 15.5, 26, and 40.2 kHz, with field amplitudes ranging from 7 to 52 mT/μ0.
URI:	http://localhost:8080/xmlui/handle/123456789/108
Appears in Collections:	Physics Department

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