Radioactive therapeutic seeds
AssigneeSyntheon, LLC
InventorsScott L. Jahrmarkt, David P. Gordon
Life of this patent
Estimating the term…
Abstract
Radioactive therapeutic seeds include one or more carrier structures each carrying a radioactive isotope, a ceramic spacer or collar member, a metal ring about the ceramic member, and a capsule formed from two tubular parts, each part including a closed end, an open end, and an interior. The open ends of the capsule abut the metal ring and are preferably welded thereto to form a generally uniform capsule wall such that the carrier structure(s) and ceramic member are contained in the interior of the capsule. The ceramic spacer preferably is hollow and a radiopaque or MRI-visible marker extends therethrough. Each of the embodiments is designed to provide a substantially isotropic distribution of radiation.
Claims39
A radioactive therapeutic seed, comprising:
- a) a carrier structure carrying a radioactive isotope;
- b) a ceramic collar member provided about said carrier structure;
- c) a metal ring provided about said collar member;
- and
- d) a capsule having two parts, each part including a closed end and an open end, said carrier structure with said collar member being disposed in said capsule with said open ends of said two parts of said capsule abutting said metal ring and said open ends of said two parts of said capsule and said metal ring being sealed over said ceramic collar member.
A radioactive therapeutic seed, comprising:
- a) at least two carrier structures each carrying a radioactive isotope;
- b) a ceramic spacer member;
- c) a metal ring about said ceramic spacer member;
- and
- d) a capsule having two parts, each part including a closed end, an open end, and a wall defining an interior, at least one of said at least two carrier structures being provided in said interior of each part, with said open ends of said two parts of said capsule and said metal ring being sealed about said ceramic spacer.
A radioactive therapeutic seed, comprising:
- a) at least one carrier structure carrying a radioactive isotope;
- and
- b) a capsule formed of a first part and a second part each having a closed end, an open end, and a wall defining an interior, and a third ring part, said first, second and third parts being formed from a substantially identical metal with said first and second parts abutting and welded to said third part which separates said first part and said second part, and said at least one carrier structure being located in said capsule.
A radioactive therapeutic seed, comprising:
- a) at least two carrier structures each carrying a radioactive isotope;
- b) a ceramic spacer member between said at least two carrier structures;
- and
- c) a capsule having two parts, each part including a closed end, an open end, and a wall defining an interior, at least one of said at least two carrier structures being provided in said interior of each part, with said open ends of said two parts of said capsule being sealed about said ceramic spacer.
Dependencies are inferred from the claim text.