Focused Deep Heating with an Inductive Type Applicator

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  • KATO HIROKAZU
    Division of Radiological Technology, Graduate School of Health Sciences, Okayama University
  • KURODA MASAHIRO
    Division of Radiological Technology, Graduate School of Health Sciences, Okayama University
  • SHIBUYA KOICHI
    Division of Radiological Technology, Graduate School of Health Sciences, Okayama University
  • KANAZAWA SUSUMU
    Department of Radiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University

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  • 誘導型アプリケータによる収束深部加温

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Abstract

A new heating technique is proposed for deep heating using an annular-shaped Inductive Aperture-Type Applicator (IATA). It was shown using finite element analysis that this heating technique could concentrate RF energy in the central or core portion of the human body to generate heat without causing excessive heating of the outer or fat layers.<BR> A fat-muscle cylindrical phantom with a diameter of 0.30 m was inserted into the opening of an annular-shaped IATA, which has an outer diameter of either 0.74 or 0.94 m, a height of 0.20 or 0.30 m, and an opening 0.34 m in diameter, and is excited by RF currents of 13.56 or 27.12 MHz. The heat generated in the central portion of the phantom was 1.11-1.27 times that of the maximum value in the peripheral muscle portion of the phantom, while heat generated in the fat layer was only 20% of that generated in the central portion of the phantom.

Journal

  • Thermal Medicine

    Thermal Medicine 23 (3), 133-143, 2007

    Japanese Society for Thermal Medicine

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