ESTRO meets Asia 2024 - Abstract Book

S10

Invited Speaker

ESTRO meets Asia 2024

(1) Surface Guided Radiation Therapy (SGRT): SGRT represents a paradigm shift in radiation therapy by employing surface imaging for patient positioning and motion monitoring. SGRT systems allows for the tracking of patient motion with sub-millimeter accuracy. The ability to track subtle surface changes is particularly advantageous for treatments like breast IMRT, where even minor anatomical variations can lead to significant dosimetric consequences. SGRT's continuous monitoring capabilities are superior to intermittent imaging methods. This is crucial for managing respiratory-induced motion and other dynamic changes that can affect treatment accuracy. Moreover, the non invasive nature of SGRT reduces the need for additional radiation exposure, which is a significant benefit, especially for pediatric and repeat treatments. (2) SGRT and CBCT Integration: The combination of SGRT and Cone Beam Computed Tomography (CBCT) offers a robust solution for patient movement management in radiotherapy. SGRT provides continuous, non-ionizing monitoring of the patient's surface, allowing for real-time adjustments to patient position and compensating for intrafraction motion. CBCT, while used for precise pre-treatment verification, confirms the adjustments suggested by SGRT and ensures accurate target localization. The high correlation between SGRT and CBCT shift measurements indicates that SGRT is a reliable adjunct to CBCT, enhancing the precision of adaptive radiotherapy. This integrated approach optimizes treatment delivery by ensuring that radiation doses are effectively and safely administered to the target area, while minimizing exposure to surrounding healthy tissues. Despite its advantages, CBCT remains the gold standard for verification, highlighting the complementary nature of these technologies in contemporary radiotherapy practice. (3) Emerging Technologies: The integration of MR imaging into the radiation therapy process is a significant development. MR offers superior soft-tissue contrast and the ability to visualize organ motion, which is particularly beneficial for tumors in areas susceptible to movement, such as the lungs, liver, and prostate. Moreover, gastrointestinal ultrasound provides real-time imaging of the abdominal and pelvic regions, playing a crucial role in the detection and monitoring of gastrointestinal cancers. This technique is particularly valuable for adapting to the daily variations in tumor position due to physiological processes such as respiration and bowel movement. The development of tools like SurVolT, which converts daily surface data into volumetric changes for treatment planning, represents the forefront of IGRT innovation. Such tools are essential for implementing adaptive radiotherapy strategies that respond to daily patient anatomical changes. In conclusion, IGART continues to evolve with a focus on increasing precision and adapting to individual patient needs. SGRT stands as a significant advancement, with its integration with CBCT providing a robust solution for clinical practice. The ongoing development of some emerging technologies (eg.MR-guided systems) ensures that the future of radiation therapy will be even more tailored and effective, ultimately improving patient outcomes and reducing side effects.

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ePROMs: What is possible?

Elizabeth Forde

Discipline of Radiation Therapy, Trinity College Dublin, Dublin, Ireland. Trinity St James' Cancer Institute, Trinity College Dublin, Dublin, Ireland

Abstract