RADIOACTIVE DIAGNOSTIC AGENT AND NON-RADIOACTIVE CARRIER THEREFOR

摘要

A <99m>Tc-labeled radioactive diagnostic agent being useful for vidualization and dynamic inspection of hepatobiliary ducts and having a high stability and no material toxicity, which comprises <99m>Tc in the form of pertechnetate and a non-radioactive carrier, the non-radioactive carrier comprising an N-pyridoxyl- alpha -amino acid of the formula:

wherein R<1> and R<2> are each an atom or an atomic group present in the alpha -amino acid residue encompassed by the dotted line and R<3>, R<4>, R<5> and R<6> are each a hydrogen atom, a halogen atom, a C1-C10 alkyl group or a C1-10 alkyl group substituted with at least one hydrophilic group or its salt, and a reducing agent for pertechnetate.