Implantable radiation therapy device having controllable radiation emission
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United States of America Patent
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Sep 28, 2004
Grant Date -
May 8, 2003
app pub date -
Oct 28, 2002
filing date -
Nov 27, 1998
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Expired
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Abstract
An implantable radiation therapy device includes a biocompatible radiotranslucent outer capsule containing a radiation shielding element and a radioactive isotope at least partially shielded by the shielding element. When the device is at or below body temperature, radiation is prevented or limited from being transmitted through the outer capsule by the shielding element. When non-ambient energy is applied to the device, the shielding element and radioactive isotope are reconfigured such that an increased level of radiation is transmitted through the outer capsule and emitted by the device.
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