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Evaluation Study of T1 Relaxation Time via Contrast Agent Molarity and Magnet Field Strength in MR

Journal of Magnetics, Volume 25, Number 4, 31 Dec 2020, Pages 595-600
Jeongmin Seo (Department of Radiologic Science, Catholic University of Pusan)
Abstract
The purpose of this study was to evaluate the T1 relaxation times to distinguish between media with different
contrast agent molarities (0.5 mmol/mL and 1.0 mmol/mL) for different magnetic field strengths (1.5 T and 3.0
T) in magnetic resonance imaging. Herein, we used the T1 mapping technique instead of signal intensities for
evaluation. The T1 times were shorter for higher molarities at the same magnetic field strength (p = 0.043);
however, there were no significant distinctions for the same molarity at different magnetic field strengths. The
rate of change of the T1 duration for half the molarity of the phantom concentration was higher at low concentrations
of the contrast agent. Therefore, the results indicate that higher concentrations of the contrast agent
may not be necessary to obtain better imaging contrast.
Keywords: MRI, MRA; magnet resonance; magnet relaxation time; magnetization
DOI: https://doi.org/10.4283/JMAG.2020.25.4.595
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