Filament for irradiating a living body and method for producing a filament for irradiating a living body

摘要

A filament 1 for irradiating a living body comprises a core 2 of material capable to irradiate radioactive radiation clad in a tubular casing 3 of protective material different from the material forming the core. The materials forming the core and casing have a purity not less than 99.5 atomic percent and a grain size not exceeding 30 mu m and the outer diameter of the filament 1 is not less than 80 mu m.