TY - JOUR
T1 - Comprehensive investigation into the stability of Varian and Elekta kV imaging systems during arc delivery
AU - Wright, Brendon
AU - Hassan, Ghulam Mubashar
AU - Mukwada, Godfrey
AU - Ebert, Martin
AU - Goodall, Simon
AU - Sabet, Mahsheed
AU - Rowshan Farzad, Pejman
PY - 2020/11
Y1 - 2020/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85092889411&partnerID=8YFLogxK
U2 - 10.1088/2057-1976/abbabd
DO - 10.1088/2057-1976/abbabd
M3 - Article
SN - 2057-1976
VL - 6
JO - Biomedical Physics and Engineering Express
JF - Biomedical Physics and Engineering Express
IS - 6
M1 - A17
ER -