A 99mTc-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 99mTc in the form of pertechnetate and a non-radioactive carrier, the non-radioactive carrier comprising an N-pyridoxyl-a-amino acid of the formula:
wherein R1 and R2 are each an atom or an atomic group present in the a-amino acid residue encompassed by the dotted line and R3, R4, R5 and R6 are each a hydrogen atom, a halogen atom, a C,-C,o alkyl group or a C1-C10 alkyl group substituted with at least one hydrophilic group or its salt, and a reducing agent for pertechnetate.
一种 99mTc 标记的放射性诊断剂,可用于肝胆管的虚拟化和动态检查,并具有高稳定性和无物质毒性,它包括过
硫酸盐形式的 99mTc 和一种非放射性载体,该非放射性载体包括一种 N-
吡哆酰-a-
氨基酸,其式如下: 其中 R1 和 R2 分别是存在于虚线所包含的 a-
氨基酸残基中的原子或原子团,R3、R4、R5 和 R6 分别是氢原子、卤素原子、C,-C,o 烷基或被至少一个亲
水基团取代的 C1-C10 烷基或其盐,以及一种过
硫酸盐还原剂。