ESTRO 2022 - Abstract Book

S714

Abstract book

ESTRO 2022

(12-15) without NTCP improvement, adherence to target constraints was improved instead. Compared to 2 mm SR, adherence to target constraints was improved for 9/15 patients at the cost of NTCP.

Conclusion The proposed plan library approach outperformed conventional treatment with fixed SR settings by reducing NTCP for similar coverage, or enhancing coverage without offline re-planning. Clinical implementation is rather straightforward making the approach a more practical online adaptive strategy than daily re-planning.

MO-0795 Systematic progression changes can assist robust IMPT plan selection for head and neck patients

Y. ZHANG 1 , J. Alshaikhi 2 , R.A. Amos 3 , W. Tan 4 , G. Royle 3 , E. Bär 3

1 University College London, Department of Medical Physics and Biomedical Engineering, London , United Kingdom; 2 Saudi Proton Therapy Center , Medical physics department, Riyadh, Saudi Arabia; 3 University College London, Department of Medical Physics and Biomedical Engineering, LONDON, United Kingdom; 4 Shenzhen Hospital of Southern Medical University, Department of Oncology, Shenzhen, China