ESTRO 2024 - Abstract Book

S2259

Clinical - Upper GI

ESTRO 2024

Conclusion:

Differences in maximum dose resulted statistically significant, not in favor of the 3Bnew, most likely due to the maximum angle of 22 degrees between the tilted-PA and PA beams. With a proper anti-collision system in place, the angle between the beams could be increased and the maximum dose would decrease. Nevertheless, this new beam arrangement could be beneficial for those patients where a plan adaptation is triggered from the first reCT or for whom difficulties during CBCT match occur the first days of treatment because of changes in diaphragm position.

Keywords: esophageal cancer, adaptation, proton therapy

References:

[1] R Canters, K Van der Klugt, V Taasti, J Buijsen, B Ta, I Steenbakkers, G Vilches-Freixas, M Berbée. Robustness of intensity modulated proton treatment of esophageal cancer for anatomical changes and breathing motion – submitted [2] R Canters, K Van der Klugt, V Taasti, J Buijsen, F Vereijken, T Verstappen, K Limpens, S Hurkmans, M Van den Bosch, F Visser, G Vilches-Freixas, M Berbee. Clinical evaluation of heart dose changes during proton therapy of esophageal cancer. Radiotherapy and Oncology 2023,182, S63-S64 [3] K van der Klugt, R Canters, V Taasti, J Buijsen, F Vereijken, T Verstappen, K Limpens, S Hurkmans, M van den Bosch, G Vilches-Freixas, M Berbee, F Visser. Clinical evaluation of proton therapy of esophageal cancer using dose summation on weekly repeat CTs. Radiotherapy and Oncology 2023, 182, S87-S88

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