Magnetic field applicator for heating magnetic or...

A - Human Necessities – 61 – N

Patent

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Details

A61N 2/02 (2006.01) A61N 2/04 (2006.01) H01F 3/02 (2006.01)

Patent

CA 2344885

The invention relates to a magnetic field applicator to heat magnetic or magnetizable substances or solids in biological tissue, with a magnetic yoke 2; 25, with two pole shoes 7, 8 across from each other and separated from each other by a gap in the exposure volume 12 on the magnetic yoke 2; 25 and with two magnetic coils 9, 10 , one assigned to each of the two pole shoes 7, 8 to produce a magnetic alternating field. According to the invention the magnetic yoke 2; 25 and the pole shoes 7, 8 consist of ferrite building blocks 16, 22 mounted together, and magnetic coils 9, 10 are disk coils with one or several helicoidally extending windings, respectively surrounding the pole shoe ends across from each other with an intercalated surrounding magnetic coil/pole shoe gap (a). In this manner a magnetic field applicator with good functions for the administration of hyperthermia as well as for thermo-ablation procedures and other medical applications is created.

L'invention concerne un applicateur de champ magnétique pour le chauffage de substances ou de corps solides magnétiques ou magnétisables dans des tissus biologiques, présentant une culasse d'aimant (2 ; 25) munie de deux masses polaires opposées (7, 8) sur la culasse (2 ; 25), maintenues à distance par une fente de champ (12), et deux bobines magnétiques (9, 10) associées chacune à une masse polaire (7, 8) pour la production d'un champ alternatif magnétique. L'invention est caractérisée en ce que la culasse d'aimant (2 ; 25) et les masses polaires (7, 8) sont constituées par des modules en ferrite (16, 22) montés conjointement, et en ce que les bobines magnétiques (9, 10) sont des bobines en forme de disques présentant un ou plusieurs enroulements hélicoïdaux, et en ce que les extrémités opposées respectives des masses polaires comprennent une fente bobine magnétique/masse polaire (a) circulaire entre celles-ci. L'invention permet ainsi d'obtenir un applicateur de champ magnétique (1) d'un bon fonctionnement pour effectuer des hyperthermies, ainsi que pour des processus d'ablation thermique et autres applications médicales.

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