Calculation of the Radiation Dose Absorbed by Human Biological Tissue When Using Imaging Equipment in Radiotherapy

The issues of x-ray dose control during diagnostic and therapeutic procedures using imaging tools are considered. The dose of x-ray radiation absorbed by the biological tissue of a person from the visualization devices of the imaging procedure was determined while monitoring the position of the patient on the therapeutic table of the electron accelerator before the radiation therapy session. The processes of transmission of photons and electrons through the medium were simulated, and the x-ray spectra were measured. The emission spectrum of a Varian G-242 Rotating Anode X-Ray Tube was obtained using an XR-100-CdTe spectrometer. The absorbed dose was calculated by the Monte Carlo method. The dose absorbed in a water phantom at tube voltage up to 80 kV was 0.9–1.5 mGy.