Comprehensive investigation into the stability of Varian and Elekta kV imaging systems during arc delivery.
accelerators
computer tomography
imaging
quality assurance
radiation therapy
Journal
Biomedical physics & engineering express
ISSN: 2057-1976
Titre abrégé: Biomed Phys Eng Express
Pays: England
ID NLM: 101675002
Informations de publication
Date de publication:
30 09 2020
30 09 2020
Historique:
received:
02
07
2020
accepted:
22
09
2020
entrez:
20
1
2022
pubmed:
30
9
2020
medline:
15
3
2022
Statut:
epublish
Résumé
In radiotherapy treatments utilizing accelerator gantry rotation, gantry-mounted kilovoltage (kV) imaging systems have become integral to treatment verification. The accuracy of such verification depends on the stability of the imaging components during gantry rotation. In this study, a simple measurement method and accurate algorithm are introduced for investigation of the kV panel and source movement during gantry rotation. The method is based on images of a ball-bearing phantom combined with a Winston-Lutz phantom, and determines the movements of all the mechanical parameters of the kV imaging system relative to the reference at zero gantry angle. Analysis was performed on different linear accelerators and both gantry rotation directions. The precision of the method was tested and was less than 0.04 mm. This method is suitable to be included in the quality assurance testing of linacs to monitor the kV imaging system performance and provides additional mechanical information that previous tests cannot.
Identifiants
pubmed: 35046147
doi: 10.1088/2057-1976/abbabd
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2020 IOP Publishing Ltd.