ESTRO 2024 - Abstract Book

S5563

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

ESTRO 2024

Conclusion:

The benefits of accelerating cone beam image acquisition are clear; the authors department, like many in the UK, is striving to maximise efficiency. Standard thoracic treatment is scheduled for 20 minutes and decreasing acquisition time from 130 second to 60 seconds could potentially increase thoracic patient throughput by 5%. This also reduces the time patients are required to maintain their treatment position, thereby reducing the possibility of intrafraction motion and improving their overall experience. Using an already existing XVI imaging preset for free breath thoracic patients originally designed for a DIBH technique, the concern was reducing the number of projections would lead to deterioration of the image quality of the reconstructed images. This study has outlined a simple, effective method of analysing CBCT image quality and has found that RTTs practicing IGRT on a daily basis did not consider the Fast Chest images to be inferior to those of the departmental established Chest XVI preset. The Fast Chest XVI preset has now been accepted for routine clinical use for thoracic patients in the department. The project has provided a template for developing and evaluating similar accelerated XVI presets for pelvic and abdomen imaging sites.

Keywords: IGRT, thoracic, efficiency