Patent ID: 8873710

Claim:
An arc radiotherapy and imaging system comprising: a first radiation system suitable for treating a region of a patient; a second radiation system suitable for imaging the region of the patient; an accelerator gantry having a rotary portion which moves in arc segments, wherein the first radiation system and the second radiation system are associated, at least in part, with the rotary portion of the accelerator gantry; and a control for automatically adjusting system operation according to a defined schedule between treating the region of the patient using the first radiation system and imaging the region of the patient using the second radiation system, wherein the control automatically adjusts operation between arc segments of the accelerator gantry responsive to a predefined series of interspersed treatment control points and imaging control points, the treatment control points and imaging control points of the predefined series being associated with different arc segments of the accelerator gantry, and wherein the control automatically switches operation responsive to a treatment control point of the predefined series to treating the region of the patient using the first radiation system, and automatically switches operation responsive to an imaging control point of the predefined series to imaging the region of the patient using the second radiation system.