For example, radioactive polymers may be produced from (a) and (bi) or (bii), wherein (a) a non-radioactive component comprising repeating units that may be produced from the reaction of a molecule containing a carbon-carbon double bond (e.g., acrylates or methacrylates such as ethyl methacrylate, methyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, methacrylic acid, acrylic