Encapsulated low-energy brachytherapy sources

Details Encapsulated low-energy brachytherapy sources Encapsulated low-energy brachytherapy sources

1999-02-11

2000-08-08

O'Connor, Cary

Surgery

Radioactive substance applied to body for therapy

Radioactive substance placed within body

600 3, A61M 3600, A61N 500

Patent

active

060994584

ABSTRACT:
An essentially cylindrical, metal-encapsulated, brachytherapy source including an outer metal capsule, an annulus in a central interior position of said outer metal capsule, and a longitudinally extending heavy metal core in said annulus. The annulus is made of the same metal as said outer metal capsule. One or more low-profile welds are formed around the central circumference of the outer metal capsule for attaching the outer metal capsule to the annulus and for sealing the outer metal capsule. A plurality of substrate particles each having bound thereto a radioisotope are positioned in the outer metal capsule so that the radioisotope is distributed symmetrically within the source, equally divided between the two ends of the source, and positioned with a strong bias towards the extremes of the two ends of the source.

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"Instertital Brachytherapy--Physical and Clinical Consideration", Interstitial Collaborative Working Group, Raven Press, New York (1990), ISBN 0-882167-581-4 Medical Physics, vol. 19, No. 4, pp. 927-931 (1992).

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