Fig. 3
From: A model for preemptive maintenance of medical linear accelerators—predictive maintenance
Graphical representation of the gantry position during the VMAT QA delivery. The Y-axis is gantry position in degrees and the X-axis is time in snapshots of 20 mSec. The segments of the delivery in which the speed is calculated are highlighted in red (snapshots 10–760) and light blue (snapshots 4120–4250). The segment used as the cross correlation baseline is show in green (snapshots 2525–3350)