ESTRO 2025 - Abstract Book

S4105

RTT - Patient care, preparation, immobilisation and IGRT verification protocols

ESTRO 2025

Figure 1. Box Plot of SD values for all the analyzed patients.

Conclusion: This analysis underscores the effectiveness of the DS mask in providing superior rotational stability, which is critical for high-precision radiotherapy treatments. These findings suggest that the DS mask may offer improved immobilization and reproducibility in stereotactic treatments, especially in terms of controlling rotational shifts. Further studies are recommended to confirm these results and to explore the clinical implications of mask selection in stereotactic radiotherapy.

Keywords: thermoplastic, masks, SRS

2873

Digital Poster A multi-institutional review and critical evaluation of motion management for Liver Stereotactic Ablative Body Radiotherapy (SABR) Disha Patel 1,2 , Gemma Burke 3 , Simon Stevens 4 1 Radiotherapy, The London Clinic, London, United Kingdom. 2 Health and Social Care, Sheffield Hallam University, Sheffield, United Kingdom. 3 Health and Social Care Professional Lead Radiotherapy and Oncology, Sheffield Hallam University, Sheffield, United Kingdom. 4 Medical Physics, The London Clinic, London, United Kingdom Purpose/Objective: Aim: To identify an optimal respiratory MM system for the treatment of hepatocellular carcinoma and liver metastases. Background: Stereotactic Ablative Body Radiotherapy (SABR) to hepatocellular carcinoma or metastases can be influenced by respiratory motion which can compromise treatment accuracy. While several motion management (MM) solutions are clinically available, to date their effectiveness has to date not been systematically compared in a