A radiation system is provided comprising a single source of therapeutic radiation that is directed toward at least two treatment spaces in succession. Each treatment space houses a patient to be treated, each patient being secured generally by a separate supporting device adapted to support the patient in a generally sitting or standing or horizontal position. The x-ray source first delivers at least one beam to the first patient in the first space and then the x-ray source/patient relationship is adjusted so as to deliver an at least one beam to an at least second patient in a second space.
