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Some contrast agents in oilwell logging and in medical MRI
Author(s) -
Brown Robert J. S.
Publication year - 1993
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.1910290419
Subject(s) - contrast (vision) , magnetic resonance imaging , logging , medicine , computer science , radiology , artificial intelligence , biology , ecology
Magnetite particles and paramagnetic ion chelates are used as contrast agents in both nuclear magnetism logging of oilwells and in medical MRI. An analytic expression for reduction of T 2 for free precession signal decay (or gradient echoes) by magnetite particles does not depend on diffusion and agrees with published Monte Carlo computations.