Implantable helical coil microwave antenna
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United States of America Patent
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-
Nov 29, 1988
Grant Date -
N/A
app pub date -
Jun 19, 1987
filing date -
Jun 19, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An implantable helical coil microwave antenna, particularly adapted for interstitial hyperthermia therapy of cancer, comprises a coaxial cable having a distal end of its outer conductor removed and a helical coil mounted on the exposed inner conductor insulator. A proximal end of the helical coil is separated axially from the distal end of the outer conductor and the distal end of the helical coil is connected to the inner conductor of the coaxial cable feed line. The antenna functions to confine heat to the area immediately surrounding the coil and thus induces substantially identical thermal profiles at varying antenna insertion depths in tissue when the antenna is energized with microwave energy.
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