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Resonant circuits for hyperthermia excited by RF magnetic field of MRI

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6 Author(s)
Morita, M. ; Dept. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan ; Inoue, T. ; Yamada, T. ; Takemura, Y.
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The hyperthermia using a magnetic resonance imaging (MRI) is proposed. A resonant circuit consisting of a closed connection of coil and capacitor was used as an implant heated by an external ac magnetic field. Its resonant frequency was 63.9 MHz. The maximum temperature rise of 40°C was obtained from the thermally insulated resonant circuit by applying the field of 0.034 Oe with continuous wave. The rf magnetic field of the MRI with a low duty factor could raise the circuit temperature up to 13°C. This therapeutic method enables a repeated combination of the hyperthermia treatment and MRI diagnosis by confirming the operated effect.

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Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 10 )