IMRT 2018

Picket Fence test, analysis

• Gap position

• Weighed average • Fit to a Gaussian

• Width of gap

• Intensity of the gap

Jørgensen MedPhys 38, 2011. Tolerance levels of EPID-based quality control for volumetric modulated arc therapy Fredh, RO 94, 2010. Automated analysis of images acquired with electronic portal imaging deviceduring delivery of quality assurance plans for inversely optimized arc therapy Christophides, PMB 61,2016. Automatic detection of MLC relative position errors for VMAT using the EPID-based picket fence test