abstract |
Physiologically tolerable complex salts which contain (a) a central element selected from elements having atomic numbers of from 21 to 29, 42, 44 and from 57 to 83, and (b) a radical of a physiologically-tolerable complex-forming acid and, if desired, (c) a radical selected from radicals of inorganic and organic bases and amino acids, and their use in NMR, X-ray and ultra-sound diagnosis. |