Characterizing the field-dependent T1-relaxation and imaging of ferrofluids using high-Tc superconducting quantum interference device magnetometer in low magnetic fields

S. H. Liao, Hong Chang Yang, H. E. Horng, C. W. Liu, H. H. Chen, M. J. Chen, K. L. Chen, C. I. Liu, L. M. Wang

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4 Citations (Scopus)

Abstract

In this paper, we investigate the field-dependent T1-relaxation and T1-contrast imaging of ferrofluids using high-Tc superconducting quantum interference device (SQUID)-detected nuclear magnetic resonance and imaging in low magnetic fields, where T1 is the spin-lattice relaxation time. It was found that the 1/T1 of ferrofluids increases when the prepolarization field increases. We attribute this to the enhanced magnetic-field gradients generated from the induced magnetization that accelerates the T1-relaxation more in a high strength of fields in comparison to a low strength of fields. Using phantoms with different relaxation times, the T1-contrast images are demonstrated in low magnetic fields, which can be promising for discriminating tumors.

Original languageEnglish
Article number123908
JournalJournal of Applied Physics
Volume112
Issue number12
DOIs
Publication statusPublished - 2012 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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