Rotating frame spin lattice relaxation in a swine model of chronic, left ventricular myocardial infarction.
Rotating frame spin lattice relaxation in a swine model of chronic, left ventricular myocardial infarction.
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DOI:
10.1002/mrm.22543
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发表时间:
2010-11
影响因子:
3.3
通讯作者:
Reddy, Ravinder
中科院分区:
文献类型:
--
作者:
Witschey, Walter R. T.;Pilla, James J.;Ferrari, Giovanni;Koomalsingh, Kevin;Haris, Mohammed;Hinmon, Robin;Zsido, Gerald;Gorman, Joseph H., III;Gorman, Robert C.;Reddy, Ravinder
T1ρ relaxation times were quantified in a swine model of chronic, left ventricular myocardial infarction. It was found that there were low frequency relaxation mechanisms that suppress endogenous contrast at low spin lock amplitudes and in T2-weighted images. A moderate amplitude spin locking pulse could overcome these relaxation mechanisms. Relaxation dispersion data was measured over a range of RF field amplitudes and a model was formulated to include dipole-dipole relaxation modulated by molecular rotation and an apparent exchange mechanism. These techniques may find some use in the clinic for the observation of chronic, left ventricular cardiac remodeling.
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影响因子:
2.2
作者:
Charagundla, SR;Borthakur, A;Reddy, R
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