ESTRO 2025 - Abstract Book

S3643

Physics - Quality assurance and auditing

ESTRO 2025

Conclusion: The findings showed a statistically significant difference in the PTV dose differences calculated by Compass and myQA iON, attributed to the differences in the dose calculation algorithms of the systems. No significant difference was found between the measurement systems, indicating their performance is comparable. The examined detectors were also found to have comparable sensitivity in MLC error detection. Lastly, the strong correlation between the FI complexity index and PSQA results highlights its potential as a predictive tool for PSQA outcomes, which could be utilised to streamline PSQA processes. References: Chan, G. et al., 2021. Survey of patient-specific quality assurance practise for IMRT and VMAT. Journal of applied medical physics, 22(7), pp. 155-164 Han, C., Yi, J., Ai, Y. & Zheng, X., 2020. Cross verification of independent dose recalculation, log files based and phantom measurement-based pre-treatment quality assurance for volumetric modulated arc therapy. Medical physics, Volume 21, pp. 98-104 Kry, S. et al., 2019. Independent recalculation outperforms traditional measurement based IMRT QA methods in detecting unacceptable plans. Medical Physics, Volume 46, pp. 3700-3708 Malatesta, Z. et al., 2023. Patient specific quality assurance in SBRT: a systematic review of measurement-based methods. Physics in medicine and biology, Volume 68 Keywords: PSQA, predictive tool, analysis