ESTRO 2025 - Abstract Book

S3036

Physics - Image acquisition and processing

ESTRO 2025

Conclusion: DIR is more accurate than RIR for mapping dose between repeat courses of thoracic radiation therapy. Inclusion of corresponding landmarks in registration increases accuracy at those locations. Dose mapping errors at were in general low with DIR, however DME increases in high dose gradients.

Keywords: reirradiation, image registration, dose mapping

References: 1. Rulach, R., et. al., An International Expert Survey on the Indications and Practice of Radical Thoracic Reirradiation for Non-Small Cell Lung Cancer. Advances in Radiation Oncology, 2021. 6 : p. 100653-100653. 2. Hardcastle, N., E. et. al. , Multi-centre evaluation of variation in cumulative dose assessment in reirradiation scenarios. Radiother Oncol, 2024. 194 : p. 110184. 3. Andratschke, N., J. et.al , European Society for Radiotherapy and Oncology and European Organisation for Research and Treatment of Cancer consensus on re-irradiation: definition, reporting, and clinical decision making. Lancet Oncol, 2022. 23 (10): p. e469-e478.

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Digital Poster Step-by-step assessment of MRI-Only workflow in pelvic radiotherapy: feasibility and operational review Bin Tang, Xin Xin, Min Liu, Da Zhang, Feng Yang, Jie Li, Xianliang Wang, Junxiang Wu, Fan Wu, Jiabao Ma, Lucia Clara Orlandini Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Affiliated Cancer Hospital of University and Electronic Science and Technology of China, Chengdu, China