ESTRO 2024 - Abstract Book

S4009

Physics - Inter-fraction motion management and offline adaptive radiotherapy

ESTRO 2024

Figure 2: Match between the average projection of a 4D planning CT scan performed during CPAP ventilation and diagnostic imaging in free breathing. Lung contours as delineated on the averaged 4DCT are shown, while diagnostic imaging shows much smaller lung volume.

Conclusion:

Our results demonstrate that CPAP is a safe, feasible and effective tool to mitigate diaphragmal motion with good patient compliance. In addition, distance to organs at risk such as the bowel or mean lung dose might be improved. There is a need for further studies to identify patients that would benefit the most from CPAP ventilation for SBRT inter-fraction motion management.

Keywords: SBRT, CPAP, diaphragmal motion management

1001

Digital Poster

Multi-modality techniques for organ dose estimation & adaptive strategies in hypopharynx cancers

Raghavendra Hajare 1,2 , Anil Kumar M 1 , Rohit Vadgaonkar 1 , Shanmukhappa Kaginelli 2 , Sreelakshmi K K 1 , Aarti A 1 , Spandana P 1 , Soujanya F 1 , Kiriti C 1 , Raviteja M 1 , Umesh Mahantshetty 1 1 Homi Bhabha cancer Hospital and Research centre, Department of Radiation Oncology, Visakhapatnam, India. 2 JSS Academy of Higher Education and Research, Division of Medical Physics, Mysuru, India