Studies in various animal species have recently shown that (99m)Tc-BIG has practical and dosimetric benefits for renal imaging that could probably make it a good alternative to (99m)Tc-2, 3-dimercaptosuccinic acid ((99m)Tc-DMSA). In this study, using the baboon experimental model, the biodistribution of (99m)Tc-BIG and (99m)Tc-DMSA are compared. It is demonstrated that early good contrast imaging and more favourable dosimetry is possible with (99m)Tc-BIG compared to (99m)Tc-DMSA, confirming the quoted previous findings with small animals. Time-activity curves for kidneys and other organs support these findings, and MIRDOSE software provided the dosimetry.
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