Radioactive sources, preferably radioactive seeds, for use in brachytherapy comprising a radioisotope within a sealed biocompatible container, wherein at least one part of the outer surface of the container is grooved, preferably with a curved groove. The grooved outer surface is preferably substantially...http://www.google.es/patents/US7083566?utm_source=gb-gplus-sharePatente US7083566 - Grooved brachytherapy sources
