| abstract |
The invention concerns cationic complexes of Technetium-99m with bidentate ligands (L), including complexes having the formulae [Tc(NO) X L2]+ and [Tc L3]+, which are of interest as heart imaging agents. The ligands are characterized by having the formula Y2QZQY2, where each Q is phosphorus or arsenic, Z is a 2 or 3 carbon atom linking group, and at least one of the groups Y and Z includes at least one -COC- ether group. |