Current Proton Beam Therapy sees a gantry rotate around the patient stopping three to four occasions to deliver the beam, whereas with Proton Arc Therapy the proton beams are delivered continuously as the gantry rotates through partial arcs around the patient. This new technique aims to improve the dose delivery to the tumour resulting in better sparing of healthy tissue.
Upright imaging and positioning technologies could dramatically simplify the delivery of Proton Arc Therapy.