Abstract: The invention relates to novel aminocarboxylate ligands that are suitable for complexing with a radionuclide, and are useful as imaging agents for diagnostic purposes. In accordance with the present invention, a method of preparing a compound of formula (I): fac-[M(CO)3(OH2)3]+, wherein M is Mn, 99mTc, 186Re or 188Re, involves reacting a metal in permetallate form with carbon monoxide and a reducing agent, wherein a mixture of a basic borate buffer and a reducing agent soluble in water but not substantially decomposed by water is solved in a water containing solvent system containing a solution of the metal in permanganate, pertechnetate or perrhenate form in the presence of carbon monoxide. The compound of formula (I) can be reacted with a ligand Lx to form a compound of formula (II): fac-[M(CO)3(X)2L1]n, wherein M is as defined above Lx is a multidentate ligand, and n is a charge of the ligand Lx increased with one + charge.

Abstract: The present invention relates to the stabilization of radiopharmaceutical preparations and to the stabilization of components of radiopharmaceutical kits. In particular, the present invention relates to stabilization of lyophilized components of radiopharmaceutical kits by the addition of a cyclic oligosaccharide, such as, a modified or unmodified cyclodextrin, to the kit.

Abstract: A myocardial imaging agent for use in humans comprising a Tc(III) complex ligated in a planar position by a tetradentate ligand having incorporated therein four hard atoms and two furanone rings and in the axial positions by phosphines containing dioxanyl or ether moieties. The agent exhibits improved biodistribution, improved labeling and extremely rapid blood clearance following administration to a human. The agent has high myocardial uptake accompanied with exceptionally rapid hepatobilary clearance and extensive renal clearance to give sufficiently high heart/liver and heart/lung ratio that provide nearly ideal myocardial images in humans.

Abstract: A myocardial imaging agent for use in humans comprising a Tc(III) complex ligated in a planar position by a tetradentate ligand having incorporated therein four hard atotms and two furanone rings and in the axial positions by phosphines containing dioxanyl or ether moieties. The agent exhibits improved biodistribution, improved labeling and extremely rapid blood clearance following administration to a human. The agent has high myocardial uptake accompanied with exceptionally rapid hepatobilary clearance and extensive renal clearance to give sufficiently high heart/liver and heart/lung ratio that provide nearly ideal myocardial images in humans. A kit for producing the myocardial imaging agent is provided.