ESTRO 2024 - Abstract Book

S3634

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

ESTRO 2024

All 5 plans were successfully delivered. The gamma passing rate for each plan is tabulated below, where excellent agreement was observed between MapCHECK dose measurements and Monte Carlo calculations.

Patient #

3%/2mm Gamma pass rate

1

99.8%

2

97.2%

3

97.8%

4

98.0%

5

98.2%

Conclusion:

For STS with subcutaneous involvement, MBRT offers significant sparing of organs-at-risk without sacrificing target coverage when compared to VMAT. Leveraging the higher electron surface dose, MBRT can adequately cover superficial targets without the use of bolus. As MBRT can be accurately delivered in standard SAD setups, it offers a logistically viable and dosimetrically beneficial alternative to photon-based treatments requiring bolus.

Keywords: Mixed Beam Radiotherapy, Treatment planning study

2197

Poster Discussion

Evaluation of accumulated OAR dose DIR methods for MR-guided pancreas SABR