(a-j). Representative set of T1-weighted spoiled gradient dynamic magnetic resonance images enhanced with the prototype macromolecular contrast medium albumin-(Gd-DTPA)35 precontrast and 2, 5, 10, 15, 20, 25, 30, 40, 50, and 60 minutes after injection. Note the enhancement of the human cancer xenograft over the left lateral flank (arrowhead), most prominent in the tumor periphery, as well as the strong and time persistent enhancement of the inferior vena cava (arrow) as it passes through the rat liver.