APPLICATION OF THE MONTE CARLO METHOD FOR THE EVALUATION OF SCATTERED RADIATION DOSE DUE TO THE USE OF HANDHELD X-RAY IN DENTISTRY

The object of this study was to evaluate the dose of scattered radiation in the organs of the operator and assistant located in different positions within a dental room when acquiring intraoral images with a portable handheld X-ray device, using Monte Carlo simulations for recommended and traditional techniques. A typical dental installation was modeled, where the operator and assistant were placed. The beam is represented by 60-kV spectrum. Ten scenarios were simulated, representing different positions and use of the lead apron. The results of the simulations were carried out with typical parameters of the annual workload, showing significant increases in dose in the organs of the operator due to the angulation. The minimum dose in the organs of the assistant occurred when he was located 2-m away and 45^◦ from the direction of the beam. The dose received by the operator is significantly reduced with the use apron.