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Using microscopic techniques the authors fabricated interstitial hyperthermia applicators having diameters of 0.20, 0.33 and 0.58 mm, which will fit through catheters of 30, 26 and 22 gauge, respectively. Existing commercial applicators having a diameter of 1.1 mm require 17-gauge catheters. The authors determine the energy deposition patterns (specific absorption rate) from measurements of the electric...
A novel type of inexpensive electromagnetic hyperthermia applicator is designed which can be described for a wide range of sizes and frequencies. The applicator can be deformed in two planes to follow a desired contour. Deformation of the applicator slightly changes the operating frequency, so that either some means of fine tuning or a tunable power source must be used. For a large aperture an array...
A description is given of a microstrip radiator consisting of a circular patch in water and working at 130 MHz. The use of deionized water as a high-permittivity material for the 'substrate' allows the realization of compact, low-weight applicators for direct-contact, medium-depth treatments. The water filling the radiator also provides a good electrical transition between the antenna and the treated...
Microwave hyperthermia therapy with better diathermic character is described. The working frequency of the hyperthermia instrument is 2.45 GHz. The instrument consists of a microwave generator, logical control circuits, microwave applicators, and a temperature-measuring system. It is successful in treating piles and gastrointestinal bleeding.<<ETX>>
The authors propose to build equipment for hyperthermia which could be utilized together with radiotherapy or chemotherapy in the treatment of mammary gland cancer and dermic carcinoma. The project consists of three parts: the first was the design, development, and construction of the equipment; the second, taking place now, is experimentation with animals and phantoms, the third will be the application...
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