Computer implemented method for reducing risk of interrupting irradiation treatment session due to deviation from planned value of operating parameter of particle accelerating system

Abstract

To provide a method for reducing the risk of interrupting an irradiation treatment session due to a deviation from a planned value of an operating parameter of a particle accelerating system.SOLUTION: A computer implemented method for optimizing tolerance values of operating parameters of a particle accelerating system allows a plurality of beamlets of particles accelerated along an irradiation axis to deposit doses by pencil beam scanning into a structure of interest of a patient according to a treatment plan. The method calculates the dose (rate) volume histograms for a statistically representative number N of values randomly selected within a defined confidence level in preselected tentative statistical distributions of the operating parameters and compares the volume histograms with an acceptable band of variation BV of a target. Once, from the tentative statistical distribution, N calculated volume histograms are obtained, which all fall within the acceptable band of variation, it is set as the final statistical distribution, and the particle accelerating system can be programmed with the final statistical distribution.SELECTED DRAWING: Figure 1

Images