title: [Biokinetics of tumor-affinity yttrium preparations--2].
abstract: After demonstrating that the application form 87Y-NTA-EDTMP-Ca is superior to the so far used citrate form of yttrium especially regarding the tumour/liver and tumour/bone ratios, the relationships between the concentrations of the components in the 87Y-NTA-EDTMP-Ca mixture and the 87Y biokinetics were investigated in tumour-bearing mice. The increase of the EDTMP and Ca2+ concentrations by several orders of magnitude caused no significant changes of tumour radioactivity but a clear radioactivity decrease in the liver, spleen and bone, respectively. The increase of the NTA concentration led also to a radioactivity decrease in all organs and tissues investigated. A significant radioactivity reduction in the tumour could be observed only after administration of rather high NTA amounts. Considerations of the tumour/background ratios depending on different compositions of the injection mixture showed the possibility of optimizing radionuclide biodistribution.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D005260:Female; D008325:Mammary Neoplasms, Experimental / Q000000981:diagnostic imaging / Q000378:metabolism*; D008546:Melanoma, Experimental / Q000000981:diagnostic imaging / Q000378:metabolism*; D051379:Mice; D008815:Mice, Inbred Strains; D011877:Radionuclide Imaging; D012016:Reference Values; D014018:Tissue Distribution; D015021:Yttrium Radioisotopes / Q000493:pharmacokinetics*
chemical_list: D015021:Yttrium Radioisotopes; D002118:Calcium
vernacular_title: Untersuchung zur Biokinetik tumoraffiner Yttrium-Zubereitungen--2. Teil.