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In recent years, various types of medical applications of microwaves have widely been investigated and reported. In this paper, surgical devices, which is biological tissue coagulation device by the thermal effect of microwave, is introduced. In addition, characteristics of the device are evaluated by numerical calculations and experiments. As a result of investigations, possibilities of surgical...
This paper describes a few examples of small antennas for medical applications particularly for interstitial and intracavitary microwave hyperthermia. We have demonstrated heating patterns around the coaxial-dipole antenna for the treatment of brain tumor. Then we have shown the investigation of heating performances of the coaxial-slot antenna for treatment of bile duct carcinoma. As a further study,...
Hyperthermia is one of the modalities for cancer treatment, utilizing the difference of thermal sensitivity between tumor and normal tissue. Up to now, the authors have been studying various coaxial-slot antennas for microwave hyperthermia. A coaxial-slot antenna aiming at intracavitary heating for bile duct carcinoma has been especially developed. In this paper, heating performances of such an antenna...
The authors have been studying thin coaxial-slot antennas for interstitial microwave thermal therapy. In this paper, firstly, the structure of the coaxial-slot antenna is briefly reviewed. Secondly, the procedure for temperature calculation around the antennas and the calculation model based on the CT images of the patient are described. Thirdly, the blood flow rate of the tissue concerned during...
Interstitial microwave phased-array applicators with extended heating regions and improved input impedance matching have been developed. The authors present two types of thin coaxial microwave antenna elements for such an applicator: a sleeve antenna and a helical slit antenna. The structures are illustrated, and their advantages and disadvantages are described briefly.<<ETX>>
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