Abstract
Intensity Modulated Proton Therapy (IMPT) can take great advantage of fast tools based on analytical or semianalytical approaches providing dose evaluation in a target. Here, a semianalytical method is described that has been developed for the TOP-IMPLART (Intensity Modulated Proton Linear Accelerator for RadioTherapy) accelerator, consisting of a pulsed full linear accelerator for proton therapy being developed at ENEA Frascati, where preliminary tests of active beam energy and intensity modulation are undergoing. The method relies on a two-step procedure that provides the main accelerator parameters and optimizes the number and the weights of the energetic components needed to obtain a uniform Spread-Out Bragg Peak (SOBP) in the target region. In the present paper, the theoretical basis of the method is described in detail together with two practical example applications.
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