Radio frequency thermotherapy

Details Radio frequency thermotherapy Radio frequency thermotherapy

1989-06-01

1992-03-31

Cohen, Lee S.

Surgery

Magnetic field applied to body for therapy

Radio frequency wave induced magnetic field for subcutaneous...

600 13, 600 14, 128804, 336229, 219 1079, A61N 204

Patent

active

050997564

ABSTRACT:
Apparatus for treating neoplasms in humans and animals comprising a hollow toroidal applicator which resonates at a specific radiofrequency, and which possess electrically conductive walls on which radial radiofrequency currents flow and generate a high density of uninterrupted magnetic flux within the hollow body. A rotatable antenna connected to a source of radiofrequency power is mounted inside the applicator body to couple with the electromagnetic field of the applicator. The body part to be treated is interposed through side apertures or through the space created by removing a segment of the toroid which can have orifices of predetermined cross sectional areas across which a tubular zone of high magnetic flux travels through the interposed tumor and normal tissue to induce more heat in the interposed tumor tissue than in the interposed normal tissue.

REFERENCES:
patent: 3890953 (1975-06-01), Kraus et al.
patent: 4325361 (1982-04-01), Harrison
patent: 4402309 (1983-09-01), Harrison
patent: 4674481 (1987-06-01), Boddie, Jr. et al.
Y. Kotsuka et al., "Ferrite Applicator and Implant Material for Local Hyperthermia of Induction Heating", in: T. Sugahara and M. Saito (eds.), Proc. Symp. on Hyperthermic Oncology, vol. 1, pp. 843-844, Taylor and Francis, Bristol, 1989.
Y. Saitoh et al., "A Re-Entrant Resonant Cavity Applicator for Deep and Concentrated Hyperthermia", in: T. Sugahara and M. Saito (eds.), Proc. Symp. on Hyperthermic Oncology, vol. 1, pp. 837-838, Taylor and Francis, Bristol, 1989.

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