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Fig. 6D. Measured signal-to-noise ratio (SNR) versus concentration of
gadodiamide in normal saline, and saline with iohexol (iodinated contrast
material), for four sample sequences. SNR curves for other T1- and T2-weighted
sequences were similar in form to those shown here. Gradient-echo sequences,
34/13 (1.5 T) and 33.3/13 (3 T).