Experimental Study and Quantitative Analysis of the Physical Parameters of the Proton Therapy Scanning Beam Delivery System

The development of proton therapy techniques imposes strict requirements for the accuracy of proton beam delivery. Existing methods for determining the planning target volume allow one to take into account only the influence of patient positioning errors before the start of irradiation. In this paper, the results of work on taking into account proton therapy system beam delivery errors for determining the planning target volume are presented. The technique for measuring the proton beam parameters and analyzing the measurement results is described. The calculation of the minimum required margin from the clinical target volume is carried out to guarantee its irradiation, taking into account the errors in beam delivery by the proton therapy system.