5 Parmaceutical, medicinal and veterinary preparations and substances, namely, implantable, encapsulated, radioactive i-125 seeds contained in a rigid bio-absorbable carrier for use in brachytherapy for the treatment of cancer; and cartridges comprising implantable, encapsulated, radioactive i-125 seeds contained in a rigid bio-absorbable carrier for use in brachytherapy for the treatment of cancer