ESTRO 2025 - Abstract Book

S1553

Clinical – Mixed sites & palliation

ESTRO 2025

The entire process highlighted some of the key elements of our proposed model, which should be considered for every reRT: • Comprehensive Treatment Review: includes access to patient's previous RT plans with 1) DICOM format and dose conversion in EqD 2 (through TPS tools) of both first and subsequent RT plans for an accurate image registration and dose summation or 2) paper format for worst-case scenario planning • Detailed Dosimetric Analysis and Data Reporting: this involves an evaluation of the deliverable dose to the target volume and the constraints to OAR, considering the dose received by the neoplastic tissue and by the OARs. Specific reports have been drawn for different districts (brain, head and neck, torax, abdomen/pelvis, prostate), outlining the cumulative doses received by the organs across different treatments, which is then documented in patient's medical records. • Dual Physician Review and Validation: the reRT plan undergoes rigorous review and validation by two independent physicians, reinforcing the thoroughness and safety of the proposed plan. Conclusion: Our study presents a model ensures a robust and secure quality assurance process throughout the evaluation, planning, and execution phases of retreatment in radiotherapy. This model stands as a commitment to patient safety, treatment efficacy, and innovation in the field of radiation oncology.

Keywords: reirradiation, workflow