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. Author manuscript; available in PMC: 2018 Apr 2.
Published in final edited form as: J Appl Clin Med Phys. 2017 Jun 2;18(4):84–96. doi: 10.1002/acm2.12100

Fig. 8.

Fig. 8

The 3D rendering of beam orientations for virtual simulation IMRT plan (left) and VMAT plan (right) of an example patient from this study in our planning system Pinnacle. The step-and-shoot IMRT plan consists of 10 beams, each beam has 5 to10 segments. The VMAT plan is composed of two arcs; each arc has about 70 control points. Gantry angle interval between two consecutive control points is 2 degree. In both IMRT and VMAT plans, the beam is restricted as least 30 degrees away from the probe.