An electrically-powered and/or programmable radiotherapy device that is a component of an accelerator system specifically designed to position and support a patient, typically supine, during treatments administered using a medical linear accelerator or non-linear accelerator. It is a flat surface on legs that includes electronic and/or software controls for top height adjustments and positioning. It may be an independent device that is stationary or mobile, or it can be an integral component of a medical accelerator system design.