Radiology General 872e0fb1 Which of the following radiopharmaceutical is used in Imaging of Reticulo endothelial system A Tc-99m Red blood cells B Tc-99m Pyrophosphate C Tc-99m Sulfur Colloid D Tc-99m Teboroxime High-Yield Explanation Tc-99m Sulfur Colloid -Imaging of RES, Gastric emptying, GI bleeds.