Kotelnikov Institute of Radioengineering and Electronics of RAS
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
Kotelnikov Institute of Radioengineering and Electronics of RAS
Moscow, Moscow, Russian Federation
Moscow, Moscow, Russian Federation
Nizhny Novgorod, Nizhny Novgorod, Russian Federation
Kotelnikov Institute of Radioengineering and Electronics of RAS
Moscow, Moscow, Russian Federation
In this work we performed UHF heating with an electromagnetic field of frequency 40.68 MHz and power of 30 W on human forearms and phantoms made of plastisol with simulated blood flow at physiotherapeutic doses of 10, 15 and 20 minutes. Thermal acoustic radiation of heated objects measured with a multichannel acoustothermograph with a bandwidth of 1.6-2.5 MHz, an integration time of 10 C, and a threshold sensitivity of 0.2 K. Additionally, the surface temperature of the forearm measured by infrared thermometry and the internal temperature of the phantom by an electronic thermometer. We obtained data about temperature distribution patterns in the human forearm and in the plastisol phantom. Blood flow in the phantoms was simulated by copper, aluminum and polyvinyl chloride tubes, through which water from a thermostat was passed. Comparison of cooling rates of different types of phantoms showed that the thermal properties of the phantom with aluminum tubes were the closest to the soft tissues of the human forearm. The data of objective control do not agree with the subjective sensations of the subjects, but agree well with each other, which confirms the necessity and shows the possibility of objective assessment of temperature distribution parameters in the soft tissues of the human body during hyperthermia during UHF-physiotherapy.
passive acoustic thermometry, thermal acoustic radiation, acoustic temperature, infrared thermography, hyperthermia, physiotherapy, plastisol phantom
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