A data structure in a computer-readable form is provided that includes a string construct and a data construct. An embodiment comprises forming a MOS device and thermally oxidizing the MOS device to form a gate dielectric substantially thicker at a gate dielectric edge than that at a gate dielectric center. the three dimensional ultrasound image data and the interventional system data are oriented and sealed to a common frame of reference and then combined. The member components may all be see-through to allow visual inspection of the wound without requiring removal of the dressing.