ESTRO 2024 - Abstract Book

S4708

Physics - Optimisation, algorithms and applications for ion beam treatment planning

ESTR0 2024

Figure 1: Distribution of the fluences of the different isotopes of the fragmentation products

Figure 2. Comparison of stopping powers in water for different oxygen isotopes, normalized to that of O-16

Conclusion:

The results of this study outline the importance of the different fragments for the determination of the stopping power ratios in carbon ion beams. However, their clinical and radiobiological impact need to be investigated in future studies. Additionally, the influence of the variety of fragments on the detector’s response besides the stopping power ratio by direct interactions within the detector’s components requires further investigations. This study also demonstrated that the stopping power ratio is insensitive to minor changes of the particle fluences produced by different physics lists investigated. A deeper understanding of the fragmentation processes and their consequences would allow for further optimisation of particle therapy and associated dosimetry.

Keywords: Carbon ion, Stopping power ratio, Monte Carlo