ESTRO 2023 - Abstract Book

S1748

Digital Posters

ESTRO 2023

Conclusion Titanium implants perturb the proton dose distribution, significantly reducing the robustness of the treatment plan. PEEK was found to shift the range of the Bragg Peak and perturb the dose, relative to water, by less than 1.6 % and 2 % respectively. PEEK is demonstrated to be a favourable implant material for proton therapy. The use of PEEK as an alternative to titanium for cancer patients directly addresses the core of the problem in imaging and dosimetry introduced by using high density material in radiation beams. PEEK implants preclude the need for additional image processing, implant avoidance and dose correction processes. PEEK implants might enable patients to undergo proton treatment that would have otherwise been impossible due to the presence of metallic implants.

PO-1980 The interplay effect and mitigations with cyclotron and linac proton beam scanning for lung SBRT

C. Liu 1 , A. Kolano 2 , T. Gray 1 , J. farr 3 , K. Stephans 1 , G. Videtic 1 , P. Xia 1

1 Cleveland Clinic, Radiation Oncology, Cleveland, USA; 2 Advanced Oncotherapy , Application of Detectors and Accelerators to Medicine, Meyrin, Switzerland; 3 Advanced Oncotherapy, Application of Detectors and Accelerators to Medicine, Meyrin, Switzerland

Purpose or Objective