Plastic brachytherapy sources
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United States of America Patent
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Apr 12, 2011
Grant Date -
Oct 5, 2006
app pub date -
Aug 20, 2004
filing date -
Aug 20, 2003
priority date (Note) -
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Abstract
An implantable source (40) of therapeutic radiation for brachytherapy is provided as a sealed, biocompatible capsule (410) of plastic (e.g. polyethylene or PEEK) transparent to the radiation. The capsule contains a radiation source (400) comprising particles of a radioactive isotope (e.g. Pd.sup.103, I.sup.125, Cs.sup.131) in a fluid carrier that is resistant to radiation polymerization but solidifies at elevated temperature. It also has a marker (420), and desirably has a socket (430) which accommodates attaching spacers (660) and makes possible linear strands and planar arrays of the capsules. The spacers may be functional, e.g. heat-generating or medication-releasing.
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