Method and apparatus creating a radioactive layer on a receiving substrate for in vivo implantation
AssigneeVarian Medical Systems, Inc.
InventorsMichelangelo Delfino, Mary E. Day
Life of this patent
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Abstract
An apparatus and method of forming a radioactive stent having a radioactive layer. A solution containing a radioactive isotope depositing substance in solution is provided and placed into contact with the stent or any other substrate material capable of receiving the radioactive isotope. The radioactive isotope is deposited on the stent or substrate material. Preferably a phosphorous isotope is used and the solution is polymerized forming polymer chains containing the radioactive isotope. In this embodiment, the phosphorous is bonded with the substrate material in a phosphorous-oxygen-phosphorous network.
Claims15
A method of imparting radioactive properties to a substrate material, comprising the steps of:
- providing a solution containing a radioactive isotope depositing substance within the solution, wherein the solution contains polymerized chains including within each said chain a bonded radioactive isotope;
- providing the substrate material, the substrate material being capable of receiving a radioactive isotope containing substance from the solution;
- and
- treating at least a portion of the substrate material with the solution and forming a layer of material containing the polymerized chain and bonded radioactive isotope on the portions of the substrate material that are treated with the solution.
Dependencies are inferred from the claim text.