ESTRO 2023 - Abstract Book

S1479

Digital Posters

ESTRO 2023

oxygen can be removed. The final PAGAT gel can then be transferred to the measurement containers to be irradiated using a tap. Results The described system can produce up to 1.5L PAGAT gel in reproducible quality and in a time of approx. 2.5 hours. The oxygen contamination can be considerably reduced by the closed system using nitrogen purging in combination with a negative pressure. The calibration curves (Fig.2) generated by irradiating the PAGAT gels were comparable to Elter et. al.. The cost of this system was approx. 1500 € . Conclusion With the system, it is possible to further automate the polymer gel production by installing electronic valves together with an appropriate control technology.

[1] Elter et. al., Biomedical Physics & Engineering Express 7, 057001, 2021 Acknowledgement: This project was supported by the German Cancer Aid (grant no. 70114398).

PO-1761 Compare different types of radiation detectors used to determine the Quality Index on CyberKnife

K. Ś wi ą tek 1 , K. Matuszewski 2 , M. Wosicki 2 , B. Pawa ł owski 2

1 Greater Poland Cancer Centre, Medical Physics , Pozna ń , Poland; 2 Greater Poland Cancer Centre, Medical Physics, Pozna ń , Poland