ESTRO 2024 - Abstract Book

S4895

Physics - Quality assurance and auditing

ESTRO 2024

The VESPA auditing method uses the centre’s EPID system and therefore has dependence of the audit uncertainties on the EPID type. Results for newer TrueBeam and Elekta systems show high concordance of delivered and planned doses. Overall VESPA provides a low uncertainty and extremely cost-effective auditing option.

Keywords: dosimetric auditing, EPID, dose evaluation

2480

Poster Discussion

dosimetric intercomparison for intracranial radiosurgery in Switzerland

Sara Abdollahi 1 , Peter Pemler 2 , David Jeller 3 , Sergejs Unterkirhers 4 , Tanja Hertel 5 , Sheeba Thengumpallil 6 , Stephan Klöck 7 , Cecile Chatelain 8 , Maud Jaccard 9,10 , Sarah Ghandour 11 , Olivier Pisaturo 12 , Natacha Ruiz López 13 , Daniel Schmidhalter 14,15,16 , Juan Garcia 17 , Patrick Weber 18 , Francesco Pupillo 19 , Veronique Vallet 20 , Rachid Boucenna 21 , Christian Tata 22 , Martin Härtig 23 , Harald Petermann 24 , Vincent Fave 25 , Nathan Corradini 26 , Jerome Krayenbueh 1 , Stephanie Tanadini-Lang 1 1 University Hospital of Zurich, Radiation Oncology, Zurich, Switzerland. 2 Stadtspital Zürich Triemli, Radiation Oncology, Zurich, Switzerland. 3 Luzerner Kantonsspital, Radiation Oncology, Luzern, Switzerland. 4 Klinik Hirslanden, Radiation Oncology, Zurich, Switzerland. 5 Kantonsspital St.Gallen, Radiation Oncology, St.Gallen, Switzerland. 6 Hirslanden Clinique des Grangettes, Radiation Oncology, Chêne-Bougeries, Switzerland. 7 Lindenhofspital, Radiation Oncology, Bern, Switzerland. 8 Radio Onkologiezentrum Biel Seeland, Radiation Oncology, Biel-Bienne, Switzerland. 9 Clinique de Genolier, Radiation Oncology, Genolier, Switzerland. 10 Clinique Générale-Beaulieu, Radiation Oncology, Genève, Switzerland. 11 Hôpital Riviera-Chablais, Radiation Oncology, Rennaz, Switzerland. 12 Hôpital Fribourgeois, Radiation Oncology, Fribourg, Switzerland. 13 Hôpitaux Universitaires de Genève, Radiation Oncology, Genève, Switzerland. 14 Inselspital, Radiation Oncology, Bern, Switzerland. 15 Bern University Hospital, Radiation Oncology, Barn, Switzerland. 16 University of Bern, Radiation Oncology, Bern, Switzerland. 17 Atrys Schweiz AG, Radiation Oncology, Liestal, Switzerland. 18 Réseau Hospitalier Neuchâtelois, Radiation Oncology, La Chaux-de-Fonds, Switzerland. 19 Ente Ospedaliero Cantonale, Radiation Oncology, Bellinzona, Switzerland. 20 Centre Hospitalier Universitaire Vaudois, Radiation Oncology, Lausanne, Switzerland. 21 Hirslanden Clinique Bois-Cerf, Radiation Oncology, Lausanne, Switzerland. 22 Clinique de La Source, Radiation Oncology, Lausanne, Switzerland. 23 St. Claraspital AG, Radiation Oncology, Basel, Switzerland. 24 Universitätsspital Basel, Radiation Oncology, Basel, Switzerland. 25 Hôpital de La Tour, Radiation Oncology, Meyrin, Switzerland. 26 Clinica Luganese Moncucco, Radiation Oncology, Lugano, Switzerland

Purpose/Objective:

The objective of this study is to conduct a dosimetric intercomparison to assess the accuracy and consistency of radiation dose calculations and measurements for stereotactic radiosurgery (SRS) treatment among multiple radiotherapy departments in Switzerland. This evaluation plays a crucial role in ensuring the precision and effectiveness of the SRS workflow, both during its initial commissioning and as an integral part of the annual quality assurance (QA) program, particularly in the context of patients with multiple brain metastases.