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. 2010 Oct 7;37(11):5627–5633. doi: 10.1118/1.3497271

Figure 1.

Figure 1

A schematic view of 4D VMAT. The trajectory of the source and aperture center are represented by flat arc trajectory and wiggle arc trajectory dots, respectively. As the target oscillates in the SI direction, the aperture center follows. Target at 10% phase and 50% phase and the corresponding BEVs are plotted. The white lines are the central lines of the beams at different gantry angles.