ESTRO 2024 - Abstract Book

S2623

Clinical - Urology

ESTRO 2024

Conclusion:

Correlations between relative bladder volume changes and virtual couch shifts are weak and mostly statistically insignificant. Shifts required were on average less than 0.3mm in each direction, suggesting satisfactory PTV expansion margins. Acute urinary toxicity rates were low and had no association with the magnitude of bladder filling or net shift. Treatment with a baseline empty bladder is feasible with daily adaptive planning utilizing ATS and ATP planning. Longer follow-up is required to determine tolerability and efficacy of this treatment approach.

Keywords: MRI-guided radiation, prostate, toxicity

References:

1. Brennan VS, Burleson S, Kostrzewa C, Godoy Scripes P, Subashi E, Zhang Z, et al. SBRT focal dose intensification using an MR-Linac adaptive planning for intermediate-risk prostate cancer: An analysis of the dosimetric impact of intra-fractional organ changes. Radiother Oncol. 2023;179:109441.

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Digital Poster

Longitudinal QOL after dose escalated ultra-hypo-fractionated prostate RT with an endorectal spacer.

Zvi Symon 1,2 , Ron Lewin 1 , Idan BarOrian 1 , Jacob Mattout 1 , Idan Tamir 1 , Ilana Weiss 1 , Ory Haisraely 1 , Lev Tsvang 1 , Sergey Dubinski 1 , Maoz Ben- Ayun 1 , Yaacov Richard Lawrence 1,2 1 Sheba Medical Center, Radiation Oncology, Ramat Gan, Israel. 2 Tel Aviv University, Faculty of Medicine, Tel Aviv, Israel

Purpose/Objective: