Neutron-activated radioactive material comprising rare earth compound, preferably thulium oxide, in matrix, e.g. of polymer, useful in medicine, e.g. for producing restenosis-preventing stents

摘要

Thulium-containing mixture (A),comprising a matrix material (MM) in which thulium oxide is dispersed and can be rendered radioactive by neutron treatment is new. An Independent claim is included for: (1) a radioactive material (B), which comprises at least one inert rare earth metal compound (specifically thulium oxide) homogeneously or non-homogeneously dispersed in a matrix material (MM') and has been rendered radioactive by neutron treatment;and (2) the preparation of (B) by dosed neutron irradiation.