Patent ID: 11969608
Assignee: RAYSEARCH LABORATORIES AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method of generating a radiotherapy plan for ion therapy designed to expose a patient to ion radiation delivered as a beam, wherein the beam is delivered as an arc, which is a continuous arc or includes at least one continuous sub-arc, and wherein the beam is shaped by means of passive devices including: a range modulating device for creating a spread out Bragg peak, SOBP, and an aperture element for shaping the beam laterally, said method being arranged to allow variation in settings of at least one of the range modulating device, the aperture element and a segment MU during the delivery of the beam, wherein the passive devices include a range compensator which is placed around the patient or across the area of the patient that will be affected by the beam, the method involving optimization, wherein the optimization uses an optimization problem set up to allow variation in settings of the range compensator.