Radioactive iodine seed

• US 4,323,055 A
• Filed: 04/08/1980
• Issued: 04/06/1982
• Est. Priority Date: 04/08/1980
• Status: Expired due to Term

• Current Assignee: Medi-Physics Incorporated (General Electric Company)
• Original Assignee: 3M Company
• Inventors: Kubiatowicz, David O.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Swisher, Nancy A. B.
• Application Number:
  US06/138,293
• Time in Patent Office: 728 Days
• Field of Search: 128/1.2, 424/4, 424/1, 424/1.5
• US Class Current: 424/1.11
• CPC Class Codes: A61N 2005/1024 Seeds
• CPC Class Codes: A61N 5/1027 Interstitial radiation therapy
• CPC Class Codes: G21G 4/08 specially adapted for medical application radiation therapy using radioactive sources A61N5/10

Abstract

Improved radioactive iodine seeds are disclosed wherein the carrier for the radioisotope is a rod-like member which is detectable by X-rays and occupies a substantial portion of the space within the seed.

Claims

1. In a radioactive iodine seed comprising a sealed container having an elongate cavity, a therapeutic amount of radioactive iodine within said cavity and a carrier body disposed within said cavity for maintaining said radioactive iodine in a substantially uniform distribution along the length of said cavity, the improvement wherein said carrier body is an elongate rod-like member formed of silver or a silver-coated substrate which is X-ray detectable, said carrier body containing a layer of radioactive iodide formed on the surface of said carrie body, said carrier body occupying substantial portion of the space within said cavity.

2. The radioactive iodine seed according to claim 1 wherein said carrier body is a silver rod.

3. The radioactive iodine seed according to claim 2 wherein said silver rod is about 0.10 to 0.70 mm in diameter.

4. The radioactive iodine seed according to claim 3 wherein said silver rod is about 3 mm in length.

5. The radioactive iodine seed according to claim 1 having radiation emission equivalent to that of between about 0.1 to 100 millicuries of radioactivity.

6. The radioactive iodine seed according to claim 1 wherein said container comprises titanium.