Encapsulated low-energy brachytherapy sources

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

A - Human Necessities

61

N

A61N 5/10 (2006.01) A61M 36/04 (2006.01) G21G 4/08 (2006.01)

Patent

CA 2261338

An essentially cylindrical, metal-encapsulated, brachytherapy source including an outer meter 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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