ALB and infection: Results for the infection model showed T : B ratios at 4 hours pi of 4 (99mTc-hIgG), 4 (125I-TNT-1), 4 (99mTc-HSA), and 5 (67Ga-citrate), and for the inflammation model T : B ratios at the same time point were 3-4 for all radiotracers.