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Fig. 1A. —39-year-old healthy man who underwent unenhanced MR angiography of portal venous system performed with regular breath-hold ECG-triggered three-dimensional half-Fourier fast spin-echo sequence with no tagging pulse. Placement of selective inversion-recovery tagging pulse on maximum-intensity-projection image was obtained with regular three-dimensional fast spin-echo sequence. Selective inversion-recovery tagging pulse (TAG-A) is placed on superior mesenteric vein to suppress inflow blood signal into portal vein.