Characterizing the field-dependent T1-relaxation and imaging of ferrofluids using high-Tc superconducting quantum interference device magnetometer in low magnetic fields
Journal
Journal of Applied Physics
Journal Volume
112
Journal Issue
12
Date Issued
2012
Author(s)
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. © 2012 American Institute of Physics.
SDGs
Type
journal article