Development of bone seeker radiopharmaceuticals by Scandium-47 and estimation of human absorbed dose.

In this study labeling EDTMP (ethylenediamine tetra(methylene phosphonic acid)) and HEDP (Hydroxyethylidene-1, 1-Diphosphonic Acid) as the carrier ligands with Scandium-47 were investigated. The biokinetics of the bone seeking of labeled ligands with Scandium-47 were assessed by measuring the skeletal absorbed dose and then the mice data extrapolated to human absorbed dose and compared with the 186/188 Rhenium-HEDP, 153 Samarium-EDTMP dosimetry data estimated by other researchers. Because the availability of 47 Sc was limited we performed some preliminary studies using 46 Sc.