ESTRO 2023 - Abstract Book

S1739

Digital Posters

ESTRO 2023

Figure 1 a) Absorbed dose in color-wash 95-107% for a HS plan together with gantry angles and measurement depths. b) Median (range) gamma pass rate for HS (green) and conventional (blue) plans. Results It was possible to reduce the mean hippocampal dose from 23 to 9 Gy(RBE), while keeping the CTV V95% above 95% for all HS plans. For the standard resolution measurements, the median pass rates were 99.5% (90.4-100) and 99.4% (79.7-100) for the HS and conventional plans, respectively (p < 0.001, fig 1b). For the high-resolution measurements, the median pass rates were 100% (95.9-100) and 97.9% (78.0-100) for ROI_HS and ROI_ring, respectively.

Figure 2 High resolution measured dose distributions for a posterior (a) and lateral (b) field with ROIs corresponding to 1) ROI_HS and 2) ROI_ring.

Conclusion