Abstract
Log data from radiation treatment machines can play a crucial role in quality assurance by enabling the recalculation of the delivered dose distribution and identification of deviations in treatment delivery. This paper proposes a novel method for recalculating the delivered dose distribution in carbon-ion radiation therapy (CIRT) using log data. The proposed approach leverages existing functionality in commercial treatment planning systems, thus, eliminating the need for specialized in-house software for dose calculation and evaluation. The performed tests entail data generation from actual log files using the Digital Imaging and Communications in Medicine standard, biological dose calculations, and gamma evaluations. The log-based approach demonstrated notable advantages, including improved time efficiency and the ability to calculate three-dimensional biological doses. By recalculating the delivered dose distributions, our method improves quality assurance accuracy in CIRT. It complements conventional measurement-based patient-specific quality assurance (PSQA) methods, serving as a valuable addition to the arsenal of tools available for treatment evaluation. We believe that our method has the potential to enhance the efficacy of PSQA and contribute significantly to the advancement of CIRT, thereby reinforcing the ongoing evolution of particle therapy.