Thermal Distribution and Clinical Experience Using a Prototype, Three-Electrode Capacitive Device Jasmin 3.1000.

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The studies with agar phantoms demonstrated that, with the symmetric, three-electrodes capacitive device employed, central axis heating patterns can be manipulated significantly without appreciable distortion of lateral heating patterns produced at midphantom depths. Problems of excessive heating of subcutaneous fat will exist in most applications of deep tumor hyperthermia with capacitive devices. Five patients with cancer recived hyperthermic treatment using a Jasmin 3, 1000. No severe side effects were experienced, it was found that through reduction of the ratio of net power to the upper electrode and lower two electrodes, steady-state temperatures in the rectum and bladder could be raised from 4 °C to 5 °C above temperature within 20 minites after heating. In this report, the possibilities and consequences of manipulation of lateral heating patterns also will be evaluated. A prototype of Jasmin 3.1000, a capacitive heating device (operating at 13.56MHz) with an upper electrode and two symmetrically placed lower electrodes is an useful equipment clinically. We investigated that clinical application and thermal distribution with agar phantoms using three-electrodes capacitive device Jasmin 3.1000
日本ハイパーサーミア学会の論文