Evaluation of the Efficacy of Different Metal Chelates of DTPA in Removing Internally-deposited Radionuclides

Abstract
The effectiveness of Co(II)-DTPA and Zn(II)-DTPA in preventing the retention of radiocerium and radioyttrium by the organs of the rat was studied and found to be insignificantly diminished as compared with Ca-DTPA. The therapeutic index of both chelates, on the other hand, is greater than that of Ca-DTPA because of their low toxicity. The possible therapeutic use of these chelates is discussed.