S2728
RTT - Patient preparation, immobilisation, and verification protocols
ESTRO 2026
age-adaptive strategies fosters safer and more inclusive radiotherapy, thereby advancing the collective pursuit of innovating radiation oncology, together. References: 1. van Haaren, P., et al., Heart position variability during voluntary moderate deep inspiration breath- hold radiotherapy for breast cancer determined by repeat CBCT scans. Phys Med, 2017. 40: p. 88-94.2. Marteau, T.M. and H. Bekker, The development of a six-item short-form of the state scale of the Spielberger State—Trait Anxiety Inventory (STAI). British Journal of Clinical Psychology, 1992. 31(3): p. 301-306.3. Moerman, N., et al., The Amsterdam Preoperative Anxiety and Information Scale (APAIS). Anesthesia & Analgesia, 1996. 82(3): p. 445-451. Keywords: Home-based preparation, self-directed training Digital Poster 2711 Initial experience with the Chabner XRT® Radiation Bra in surface-guided radiotherapy for breast cancer patients Joline Zhaoqing Chua, Wei Loong Jong Radiation Oncology, Icon Cancer Centre Singapore, Singapore, Singapore Purpose/Objective: The Chabner XRT® Radiation Bra is designed to improve patient positioning, setup reproducibility, and comfort during breast radiotherapy. In our current clinical practice, the Chabner XRT® Radiation Bra is offered as an immobilization device for patients with large and/or pendulous breasts, as well as for those seeking increased modesty during treatment. With the growing adoption of surface-guided radiotherapy (SGRT), it is essential to evaluate the compatibility of the Chabner XRT® Radiation Bra with SGRT systems and to understand its impact on treatment setup, workflow, and overall radiotherapy delivery. Our main objective of the study is to evaluate our initial experience with the use of Chabner XRT® Radiation Bra in conjunction with SGRT in breast cancer patients. Material/Methods: Six breast cancer patients were immobilised using the Chabner XRT® Radiation Bra and treated with SGRT between January - September 2025. Setup times, surface tracking data and intrafractional shifts were recorded. Data were compared to a control group treated without the Chabner XRT® Radiation Bra to assess the impact of the bra on setup efficiency and treatment stability. Results: The Chabner XRT® Radiation Bra was fully compatible
Conclusion: Breath-hold home training significantly improved DIBH eligibility, empowering patients to optimise treatment precision. Age remained the principal determinant of ineligibility, reflecting physiological limits beyond 67 years. Integrating patient-centred approaches with
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