Comprehensive investigation into the stability of Varian and Elekta kV imaging systems during arc delivery.
Biomed Phys Eng Express
; 6(6)2020 09 30.
Article
em En
| MEDLINE
| ID: mdl-35046147
ABSTRACT
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.
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Base de dados:
MEDLINE
Assunto principal:
Aceleradores de Partículas
/
Algoritmos
Idioma:
En
Revista:
Biomed Phys Eng Express
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Austrália