ESTRO 2023 - Abstract Book

S1707

Digital Posters

ESTRO 2023

The robust evaluation of LETd is shown in Figure 2. Clinical goals with respect to dose were fulfilled for all plans in all scenarios, but there are significant differences in the LET volume histogram (LVH) clusters over all error scenarios. Both the mean and max LETd of the OARs are clearly reduced in the LET-optimized plans. The arc plans have lower LETd compared to the corresponding IMPT plans and show less variation over the error scenarios.