ESTRO 2023 - Abstract Book

S1440

Digital Posters

ESTRO 2023

Conclusion The dosimetric results obtained with film measurements and secondary dose calculations are in good agreement with our criteria. High plan quality was observed with a dependence on total volume of the metastases: increasing CI and decreasing GI. These results give confidence in the accuracy of the method and our treatment plans. Measurements where multiple fractions (with lower fraction dose) was used had a lower mean pass rate compared to 1 fraction with higher dose. This was due to the difference in global gamma dose criteria. 1. Petoukhova A, Snijder R, Wiggenraad R, et al. Cancers. 2021 10;13(14):3458.

PO-1724 Reduction of reported incidents when using an automated plan check software

D. Jurado-Bruggeman 1 , I. Romera-Martínez 1 , C. Muñoz-Montplet 1

1 Institut Català d'Oncologia, Medical Physics and Radiation Protection, Girona, Spain

Purpose or Objective To assess the reduction of reported incidents in our institution when using an automated plan check software. Materials and Methods In our centre, volumes, prescriptions, and treatment plans are checked manually at specific barriers distributed throughout the planning process. Detected issues are corrected before proceeding, but some can overcome these checks and go further. If this is the case -and they are noticed- an incident is reported on our dedicated platform. ClearCheck software from Radformation is a script integrated with the Eclipse TPS (Varian Medical Systems), which automatically checks a set of plan items, including dose constraints and plan, structure, prescription, and collision checks. We have been using ClearCheck since July 2022. To assess the potential safety improvement associated with ClearCheck, we focused on its impact on reported incidents. As the period since its implementation is too short, we retrospectively evaluated which incidents would have been avoided. To do so, we collected all incidents reported from 2018 until July 2022, filtered those related only to technical aspects of the planning process (no management or organisational incidents), and determined whether they would have been detected using ClearCheck. Results A total of 761 incidents were reported in this period, of which 136 (18%) were related to planning technical aspects. Figure 1 shows the items involved, grouped by process step, and indicates whether ClearCheck would have detected them or not.