ESTRO meets Asia 2024 - Abstract Book

S360

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

ESTRO meets Asia 2024

Conclusion:

Currently, AIONS is the standard setup chosen for extended-field gynaecological patients in our centre based on ease of setup reproducibility and cost-effectiveness. One of the limitations of this study is that values collected are only based on bone matching and a small sample size. It does not account for issues such as tissue displacement in the abdominal-pelvis region, patient's weight fluctuation and internal target volume changes throughout treatment (3, 9). In the treatment of head-and-neck cancer where the use of a shell is the standard of care, poor fitting of shells due to body and tumour volume changes throughout RT has been well-documented (10, 11). With extended field gynaecological RT treating an even larger volume, the lack of conclusive benefits to shell usage cannot justify the increased patient discomfort, setup difficulty and additional time and cost required for shell fabrication for these patients. While LG performed similarly to AIOWS and AIONS, difficulties in maintaining quality control for in-house-made products limit its use clinically when compared to commercially manufactured products. With improvements in machine capabilities and image-guided RT implementation, soft tissue visualisation will be essential for adequate target coverage and OAR sparing throughout the extended-field gynaecological RT course. Further studies on AIONS with CBCT should be explored to better evaluate its performance for these patients.

Keywords: gynaecology, extended-field, radiotherapy, IGRT

References: