RF electromagnetic field generation apparatus for regionally-foc

Details RF electromagnetic field generation apparatus for regionally-foc RF electromagnetic field generation apparatus for regionally-foc

1983-10-31

1987-06-23

Coven, Edward M.

Surgery

Truss

Perineal

128804, A61B 1752

Patent

active

046744819

ABSTRACT:
A hyperthermia treatment device comprises paired multiple feed inductor rings positioned between two capacitor plates, for producing a tuned radiofrequency electromagnetic field. The spatial orientation of the elements and/or the phase of the current flowing through them is variable. Change in the spatial orientation and phase of the inductor rings produce asymmetric magnetic field patterns resulting in the development of asymmetric eddy current patterns orthogonal to the magnetic lines of force. The eddy current patterns are further focused by spatial orientation and phase adjustment of the capacitor plates. A movable grounding point is utilized to further focus induced eddy currents. The device is capable of producing focal hyperthermia at depth to heat specific volumes.

REFERENCES:
patent: 4121592 (1978-10-01), Whalley
patent: 4230129 (1980-10-01), LeVeen
patent: 4237898 (1980-12-01), Whalley
patent: 4252130 (1981-02-01), LePrist
patent: 4285346 (1981-08-01), Armitage
patent: 4292980 (1981-10-01), Suzuki
patent: 4306568 (1981-12-01), Jorre
patent: 4325261 (1982-04-01), Harrison
patent: 4346715 (1982-08-01), Gammrell
patent: 4350168 (1982-09-01), Chable et al.
patent: 4448198 (1984-05-01), Turner
NBS Technical Note 652; Development and Construction of an Electromagnetic Near-Field Synthesizer; Frank M. Greene; May 1974.

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