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Spin locking for magnetic resonance imaging with application to human breast
Author(s) -
Santyr Giles E.,
Henkelman R. Mark,
Bronskill Michael J.
Publication year - 1989
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.1910120104
Subject(s) - nuclear magnetic resonance , magnetic resonance imaging , spin echo , spin (aerodynamics) , ferromagnetic resonance , physics , condensed matter physics , medicine , radiology , magnetic field , magnetization , quantum mechanics , thermodynamics
Abstract The dependence of rotating frame spin‐lattice relaxation, T 1ρ , on locking field frequency, f 1 was measured for phantom materials and human breast tissues. These data were used to predict the relative signal strengths obtainable in a spin‐locking imaging sequence. This imaging sequence was implemented on a 0.15‐T imaging system and measurements of phantom and tissue signal strength for various imaging parameters agreed with predicted signal strengths. Compared to T 1 and T 2 , T 1ρ appears to have unique capability to distinguish tumor from normal fat and fibrous breast tissues. The applications of T 1ρ , to tissue characterization and imaging at high static field strengths are discussed. © 1989 Academic Press, Inc.