ESTRO 2025 - Abstract Book

S3948

Radiobiology - Normal tissue radiobiology

ESTRO 2025

Conclusion: MRT demonstrates significant normal tissue sparing effects in the liver, inducing localized cell death with minimal overall tissue injury and an absence of liver fibrosis in the long term. These findings highlight the potential of SFRT for clinical translation by addressing the challenges of RT in the liver. Ongoing studies use IMC to investigate immune cell dynamics and tissue repair processes post-MRT. Further studies will also focus on evaluating SFRT's tumour control efficacy in HCC.

Keywords: RILD, liver regeneration, microenvironment

References: 1.

Sotiropoulos, M. et al. X-rays minibeam radiation therapy at a conventional irradiator: Pilot evaluation in F98 glioma bearing rats and dose calculations in a human phantom. Clinical and Translational Radiation Oncology 27 , 44– 49 (2021). 2. Fernandez-Palomo, C. et al. Complete Remission of Mouse Melanoma after Temporally Fractionated Microbeam Radiotherapy. Cancers (Basel) 12 , 2656 (2020). 3. Trappetti, V. et al. Targeted Accumulation of Macrophages Induced by Microbeam Irradiation in a Tissue Dependent Manner. Biomedicines 10 , 735 (2022).

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