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PURPOSE To obtain high-spatial-resolution, venous-suppressed, contrast material-enhanced, three-dimensional (3D) magnetic resonance (MR) angiograms of the carotid arteries and aortic arch by using an(More)
BACKGROUND Dextroamphetamine is known to have profound effects on both subjective and physiologic measurements, but it is unclear to what extent these behavioral changes are a direct result of(More)