S2324
Physics - Quality assurance and auditing
ESTRO 2026
and the presence of support structures (See Fig 1). PlanGuardian also automatically generates the documentation of isocenter shifts, treatment table height, pin depth, and treatment timings. Notably, the automated documentation takes into consideration the beam arrangement, plan technique, and machine model.PlanGuardian produced a statistically significant reduction in the time required for plan checks and documentation. For the primary dosimetrist, the mean check time to perform the included checks decreased by 87.0%, from 169.6±43.5s to 22.0±8.7s (p<0.001). For the secondary checker, the mean check time decreased by 80.6%, from 132.3±40.6s to 25.7±12.1s (p<0.001) (See Fig 2). Crucially, automation eliminated the risk of human errors associated with manual oversight and incorrect data transcription for the included checks and documentation.
Conclusion: The implementation of PlanGuardian has resulted in a statistically significant improvement in planning workflow efficiency. The substantial time savings allow for the reallocation of expert physicist and dosimetrist resources to more complex, value-added tasks. Additionally, PlanGuardian eliminated the risk of human errors, thus improving the safety of the plan quality assurance workflow. References: [1] Ford E, Conroy L, Dong L, de Los Santos LF, Greener A, Gwe-Ya Kim G, et al. Strategies for effective physics plan and chart review in radiation therapy: Report of AAPM Task Group 275. Medical Physics. 2020 June 1;47(6):e236–72. Keywords: scripting, patient safety, automation
Poster Discussion 197
Towards the commissioning of volumetric modulated arc therapy on the 1.5T MR-linac Carmen R. Hoek 1 , Daniel E. Hyer 2 , Thomas A. Foppen 1 , Pim T.S. Borman 1 , Peter L. Woodhead 1,3 , Laura E. van Heerden 1 , Bas W. Raaymakers 1 , Martin F. Fast 1 , Sara L. Hackett 1
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