1. A method for treating a target within a body of a patient, said method comprising: irradiating a treatment volume having a known position; supporting the patient such that the target is adjacent to the treatment volume; scanning the body to monitor the position of the target; selectively activating a radiating apparatus in response to the monitored position of the target to irradiate the target when the target is at least partially coincident with the treatment volume; and selectively deactivating the radiating apparatus in response to the monitored position of the target when the target is not at least partially coincident with the treatment volume.