ESTRO 2024 - Abstract Book

S4142

Physics - Intra-fraction motion management and real-time adaptive radiotherapy

ESTRO 2024

Conclusion:

Margin expansions for prediction error were largest in the SI direction, with a magnitude of 2.3 mm. Differences between the 95th percentile and the 99th percentile of prediction error were up to 1mm, indicating that personalized margins would be a better solution. Lesions closer to the diaphragm should be considered carefully, as the margin expansions and interfractional changes of these lesions were larger.

Keywords: CyberKnife, Synchrony Prediction Accuracy, Margin

References:

1 Pepin EW, Wu H, Zhang Y, Lord B. Correlation and prediction uncertainties in the cyberknife synchrony respiratory tracking system. Med Phys. 2011 Jul;38(7):4036-44. doi: 10.1118/1.3596527

87

Digital Poster

Early experience with daily CBCT guided online adaptive treatment for head and neck cancer