Characterization of magnetic nanoparticles as contrast agents in magnetic resonance imaging using high-Tc superconducting quantum interference devices in microtesla magnetic fields

Shu Hsien Liao; Hong Chang Yang; Herng Er Horng; S. Y. Yang

doi:10.1088/0953-2048/22/2/025003

Characterization of magnetic nanoparticles as contrast agents in magnetic resonance imaging using high-T_c superconducting quantum interference devices in microtesla magnetic fields

Shu Hsien Liao
, Hong Chang Yang^*
, Herng Er Horng
, S. Y. Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

In this paper, we characterize the spin-lattice relaxation T₁, spin-spin relaxation T₂, and effective relaxation rate Γ_MF of magnetic fluids for magnetic resonance imaging using a high-T_c superconducting quantum interference device (SQUID) in microtesla magnetic fields. When the magnetic susceptibility of the magnetic fluid was increased, a broadening of proton nuclear magnetic resonance spectra and a growing spin-lattice relaxation T₁ as well as spin-spin relaxation T₂ were observed. The effective relaxation rate Γ_MF increased monotonically from 0 to 13 s^-1 when the magnetic susceptibility of the magnetic fluids, relative to tap water, was increased from 0 to 0.0015 emu g^-1. We demonstrate the magnetic fluid as an image contrast via a high-T_c SQUID in microtesla magnetic fields.

Original language	English
Article number	025003
Journal	Superconductor Science and Technology
Volume	22
Issue number	2
DOIs	https://doi.org/10.1088/0953-2048/22/2/025003
Publication status	Published - 2009

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/22/2/025003

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Characterization of magnetic nanoparticles as contrast agents in magnetic resonance imaging using high-T_c superconducting quantum interference devices in microtesla magnetic fields. / Liao, Shu Hsien; Yang, Hong Chang; Horng, Herng Er et al.
In: Superconductor Science and Technology, Vol. 22, No. 2, 025003, 2009.

Research output: Contribution to journal › Article › peer-review

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Characterization of magnetic nanoparticles as contrast agents in magnetic resonance imaging using high-T_c superconducting quantum interference devices in microtesla magnetic fields

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