Autor segons l'article: Hussein, M; Angerud, A; Saez, J; Bogaert, E; Lemire, M; Barry, M; Patallo, IS; Shipley, D; Clark, CH; Hernandez, V
Departament: Ciències Mèdiques Bàsiques
Autor/s de la URV: Hernandez Masgrau, Victor
Paraules clau: Tps modelling Tps commissioning System Mlc modelling Gap Calculation errors
Resum: Background and purpose: Multi-leaf collimators (MLCs) with tilted leaf sides have a complex transmission behaviour that is not easily matched by radiotherapy treatment planning systems (TPSs). We sought to develop an MLC model that can accurately match test fields and clinically relevant plans at different centres. Materials and methods: Two new MLC models were developed and evaluated within a research version of a commercial TPS. Prototype I used adjusted-constant transmissions and Prototype II used variable transmissions at the tongue-and-groove and leaf-tip regions. Three different centres evaluated these prototypes for a tilted MLC and compared them with their initial MLC model using test fields and patient-specific quality-assurance measurements of clinically relevant plans. For the latter, gamma passing rates (GPR) at 2 %/2mm were recorded. Results: For the prototypes the same set of MLC parameters could be used at all centres, with only a slight adjustment of the offset parameter. For centres A and C, average GPR were >95 % and within 0.5 % GPR difference between the standard, and prototype models. In center B, prototypes I and II improved the agreement in clinically relevant plans, with an increase in GPR of 2.3 % +/- 0.8 % and 3.0 +/- 0.8 %, respectively. Conclusions: The prototype MLC models were either similar or superior to the initial MLC model, and simpler to configure because fewer trade-offs were required. Prototype I performed comparably to the more sophisticated Prototype II and its configuration can be easily standardized, which can be useful to reduce variability and improve safety in clinical practice.
Àrees temàtiques: Radiology, nuclear medicine and imaging Radiology, nuclear medicine & medical imaging Radiation Oncology
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: victor.hernandez@urv.cat
Identificador de l'autor: 0000-0003-3770-8486
Data d'alta del registre: 2024-08-03
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.phiro.science/article/S2405-6316(24)00013-7/fulltext#%20
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Physics And Imaging In Radiation Oncology. 29 100543-
Referència de l'ítem segons les normes APA: Hussein, M; Angerud, A; Saez, J; Bogaert, E; Lemire, M; Barry, M; Patallo, IS; Shipley, D; Clark, CH; Hernandez, V (2024). Improving the modelling of a multi-leaf collimator with tilted leaf sides used in radiotherapy. Physics And Imaging In Radiation Oncology, 29(), 100543-. DOI: 10.1016/j.phro.2024.100543
DOI de l'article: 10.1016/j.phro.2024.100543
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2024
Tipus de publicació: Journal Publications