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Fig. 5A. —Graphs show calculated normalized signal intensity variation
due to measured T1 and T2 versus gadolinium concentration for T1-weighted
spin-echo sequence. Calculated graph for T1-weighted spin-echo sequence with
TR/TE of 500/15. Note that at 3 T, curve is shifted slightly to lower
concentrations for albumin solutions. Curves for normal saline solutions were
similar and are not shown. Substantially lower signal intensities are found
for solutions with gadodiamide and iohexol, with significantly greater
decrease at 3 T than at 1.5 T.
