Royal Cornwall Hospital has started using the new Varian TrueBeam linear accelerator for radiation oncology patient treatments. This is the first TrueBeam system treating patients in the southwest of the United Kingdom. MPSi worked with Coastal RadioPhysics to assist the hospital’s physics team with the commissioning of the TrueBeam for use with the Pinnacle treatment planning system. In providing this commissioning support, MPSi also implemented the new modalities available with this system.