Abstract
Abstract The World Health Organization, the International Radiation Protection Association (IRPA), and the American Conference of Governmental Industrial Hygienists have recommended using time-weighted and time-dependent standards for nonionizing radiation exposure assessment. Such hygienic norms have been developed on the basis of the electromagnetic energy evaluation. Two Varian linear accelerators, Clinac 1800 and Clinac 6X, were examined for different nonionizing radiation hazards. The sources of possible exposures are: radiofrequency driver, klystron (Clinac 1800), waveguide, gun, modulator, magnetron (Clinac 6X), power supply, and control panel with its video display units. Such sources can radiate a wide range of radiation: 50 Hz and harmonics, radiofrequency radiation (very low and low frequencies) up to 100 kHz by short pulses and electric discharges, and microwaves with frequency f ≈ 3000 MHz. The measuring instruments used in our study were gaussmeters (Safe Professional Meters) for extremely l...
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