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Objective To evaluate the feasibility of in vivo 23Na imaging of the corticomedullary 23Na gradient and to measure 23Na transverse relaxation times (T2*) in human kidneys. Methods In this prospective, IRB-approved study, eight healthy volunteers (4 female, 4 male; mean age 29.4 ± 3.6 years) were examined on a 7-T whole-body MR system using a 23Na-only spine-array coil. For morphological 23Na-MRI,...
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