VMAT planning/ rayArc
With rayArc, RayStation offers efficient design and ultrafast optimization of directly deliverable single or multiple-arc VMAT plans, that can be created in a similar way to fixed beam plans.
The beams are replaced by arcs, and there are some additional settings regarding delivery time and motions constraints. Otherwise, the optimization functions and the interface are the same. The optimization process follows the same pattern as for SMLC optimization: a preliminary fluence optimization step, sequencing into machine parameters followed by direct optimization of machine parameters.
VMAT is planned through an optimization procedure (inverse planning) where objectives and constraints for the desired dose are defined, and the system produces the plan that best matches these criteria within the limitations of the treatment machine.
That means the optimized plan is directly deliverable with no quality-degrading post processing required. Varian, Elekta and Siemens machines are supported, including non-upgraded Varian machines and the Siemens mArc.
As the computation time is measured in seconds rather than minutes, you can efficiently produce several competing treatment plans to assess different trade-off situations instead of opening a second case or going on a break during computations.