ESTRO 2024 - Abstract Book

S3714

Physics - Dose prediction, optimisation and applications of photon and electron planning

ESTRO 2024

The following table summarizes the values obtained for the DVH metrics and the time-per-iteration required for optimization.

D95

D50

D5

time per iteration [s]

ITV margin-based

0.96 ± 0.02

1.01 ± 0.01

1.02 ± 0.01

0.07

CTV margin-based

0.94±0.03

1.00±0.01

1.02±0.01

0.7

Stochastic

0.91±0.03

0.99±0.01

1.00±0.01

66.5

Variance approach

0.93±0.02

0.99±0.01

1.00±0.01

0.13

Conclusion:

The developed algorithm has proven to provide compatible results in terms of robustness when compared to stochastic optimization. Significant improvement in calculation performance was achieved with the new method and the time required for robust optimization is comparable to, or lower than, the margin-based optimization. The developed algorithm provides a feasible solution to ensure the achievement of robustness goals, avoiding at