Novel paramagnetic metal ion chelates and their use as contrast agents in the diagnostic technique known as "magnetic resonance imaging" (M.R.I.) of the gastrointestinal tract and particularly of the liver, are described. The novel compounds result from the conjugation of a bile acid with a chelating agent and are capable of chelating the ions of bivalent and trivalent metals. The compounds have formula A-L-B in which A is the residue of a bile acid and derivatives of a bile acid, B is the residue of a chelating agent of a bivalent or trivalent metal ion having an atomic number of 20 to 31, 39, 42, 43, 44, 49, 57 to 83, L is a ligand between A and B.
本发明描述了新型顺磁性
金属离子螯合物及其作为“磁共振成像”(M.R.I.)诊断技术中胃肠道和特别是肝脏的对比剂的使用。这些新型化合物是由
胆酸与
螯合剂结合而成,能够螯合二价和三价
金属离子。该化合物的
化学式为A-L-B,其中A是
胆酸及其衍
生物的残基,B是具有原子序数20到31、39、42、43、44、49、57到83的二价或三价
金属离子的
螯合剂残基,L是连接A和B之间的
配体。