Radiology In radionuclide imaging, the most useful radiopharmaceutical agent for skeletal imaging is: March 2012, March 2011 A Tc-99m linked to methylene diphosphonate (99m Tc-MDP) B Tc-99 pyrophosphate C Tc-sulphur colloid (99m Tc-Sc) D Gallium 67 💡 Explanation In radionuclide imaging, the most useful radiopharmaceutical agent for skeletal imaging is: March 2012, March 2011 ✓ Correct Answer: A. Tc-99m linked to methylene diphosphonate (99m Tc-MDP)