HIGH-FREQUENCY DEVICE FOR THE MEASUREMENT OF THE SPECIFIC ABSORBED RATE BY THE BIOTISSUES OF HIGH INTENSITY

Abstract

The aim of the present work was the elaboration of the highprecision device for measuring the Specific Absorption Rate (SAR) of Extreme High Power Pulses (EHPP). The main working principle of the device is based on the leveling of the EHPP-induced temperature increase of the studying object (biological object, liquid) and the temperature increase by alternating low frequency current on the comparison object, having the same thermo-physical parameters and mass. The controlling thermostat provides the high precision tracking of the temperature in comparison chamber to the temperature of the measuring chamber. Simultaneously, the power of the alternating low frequency current, necessary for heating the comparison object for receiving the After it, the ratio between measured power to the mass of the bio-object was determined. The main advantage of the elaborated device is the large range of power measurement (1 mW – 500 kW), wide frequency band (from ELF EMF equilibration with the temperature of the working object was also measured. to visible light), high precision (the error is determined by the differenced between the mass of the working and comparison objects and is about 1-2 %).