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An MRI phantom material for quantitative relaxometry
Author(s) -
Kraft K. A.,
Fatouros P. P.,
Clarke G. D.,
Kishore P. R. S.
Publication year - 1987
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910050606
Subject(s) - relaxometry , imaging phantom , relaxation (psychology) , nuclear magnetic resonance , materials science , agarose , proton , t2 relaxation , magnetic field , spin–lattice relaxation , field (mathematics) , biomedical engineering , magnetic resonance imaging , physics , chemistry , optics , radiology , medicine , mathematics , nuclear physics , spin echo , chromatography , quantum mechanics , pure mathematics
Abstract Most phantom media in current use exhibit T 1 relaxation times that are significantly dependent on both temperature and operating frequency. This can introduce undesirable variability into relaxation measurements due to temperature fluctuations, and complicates direct comparison of imagers operating at different magnetic field strengths. Our investigations of a nickel‐doped agarose gel system have demonstrated near independence of the proton relaxation rates to a wide range of temperatures and frequencies. We therefore propose the adoption of Ni 2+ as a relaxation modifier for phantom materials used as relaxometry standards. © Academic Press, Inc.