<unk>  is a radiopharmaceutical used in nuclear medicine imaging. It is also known as methoxyisobutylisonitrile or MIBI. The radioisotope attached to the<unk>  molecule is technetium-99m, forming 99Tcm-sestamibi (or Tc99m MIBI).
Sestamibi
Lutetium Lu 177 dotatate
Radium-223 chloride
Technetium 
Fluorodeoxyglucose
Technetium-99m
Gallium
Clodronate