Figure 1: VMAT spinal SRS treatment plan. An example of a volumetric modulated arc therapy (VMAT) stereotactic radiosurgery (SRS) plan to C2 spinal vertebrae. The right side demonstrates the 360° arc therapy concept. The image demonstrates the highly conformal and homogenic dose to the treated volume with a very rapid decrease of the dose in the spinal canal, which allows highly effective and safe radiation treatment.