Abstract: Apparatus and methods to deliver kV X-rays toward a target lesion within a body including: a treatment anode configured to receive electron beams and output the kV X-rays through a specially-designed collimator; an electron beam source configured to generate and direct the electron beams toward the treatment anode; and at least one magnet configured to steer and scan the electron beams along the treatment anode to prevent overheating of the treatment anode. The components are mounted on a gantry that rotates about the target lesion to distribute the dose delivered over a large volume of healthy tissue while substantially maximizing the dose delivered to the target lesion.