ESTRO 2024 - Abstract Book

S3518

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

ESTRO 2024

Figure 2. Differences in treatment delivery time for each patient between DA (blue-colored) and SA (orange colored) plans.

Conclusion:

SA VMAT planning technique, with newly optimized parameters, achieved clinically equivalent target coverage while significantly reducing the dose to the rectum and bladder compared to DA plans. Moreover, the treatment delivery time was substantially reduced, lowering the probability of prostate motion beyond the margins. These findings indicate a potential decrease in treatment-related toxicity and an improvement in actual target coverage during prostate SBRT treatments. Further investigations are warranted to assess the long-term clinical outcomes associated with this planning technique.

Keywords: PCa SBRT, single arc VMAT

903

Poster Discussion

Heterogeneous boosting in prostate radiotherapy: a comparison of treatment delivery modalities

Yutong Zhao 1 , Annette Haworth 2 , Scott Williams 3,4 , Simon Goodall 1,5,6 , Ben Hug 7 , Michele Krawiec 8 , Jonathan Sykes 9,2 , Jeremy Croker 8,7 , Jeremy Booth 10,2 , Andrew Le 10 , Shrikant Deshpande 11 , Richard Walther 7 , Pejman Rowshanfarzad 1,6 , Martin A Ebert 8,1,12 1 University of Western Australia, School of Physics, Mathematics and Computing, Crawley, Australia. 2 University of Sydney, Institute of Medical Physics, Sydney, Australia. 3 University of Melbourne, Sir Peter MacCallum Department of Oncology, Melbourne, Australia. 4 Peter MacCallum Cancer Centre, Division of Radiation Oncology, Melbourne, Australia. 5 GenesisCare, Radiation Oncology, Perth, Australia. 6 Centre for Advanced Technologies in Cancer Research, CATCR, Perth, Australia. 7 5D Clinics, Cyberknife Australia, Claremont, Australia. 8 Sir Charles Gairdner Hospital, Radiation Oncology, Nedlands, Australia. 9 Sydney West Radiation Oncology Network, Medical Physics, Westmead, Australia. 10 Royal North Shore Hospital, Northern Sydney Cancer Centre, St Leonards,