A method and apparatus for inducing large volume heat ablations of tissue in a patient involving electrodes that are in contact with the patient’s external surface or the surface of an internal organ. Also, to reduce bandwidth and storage requirements, to periodically refresh an EPG only the new day’s dataset and changes to the existing EPG are sent. An alteration of the digital image can include altering clothing that the person is wearing. The method also includes inserting the first andor the second end of the barbed suture through the muscularis to form at least first and second pull regions; and pulling the ends to cause the first pull region to move the first surface towards the interior volume and to cause the second pull region to move the second surface towards the interior volume. Embodiments of the invention enable rapid configuration of designs either interactively, non-interactively, or through combinations of both, and may reduce the time, labor, and expense associated with the development of such designs.