An elongate medical device includes an elongate core and a substantially flat sheet formed into a tubular body defining a longitudinal axis and disposed around at least a portion of the elongate core, where the flat sheet has a length, and where a cross-sectional thickness of the sheet varies along the length of the sheet. Fields of image data that have been derived from single frames of the scanned image frames are determined, and signals produced representative of each of the image frames. The imprintable portion has a width equal to the width of the tape and the first and second portions each have a width substantially less than that of the tape. The power supply unit supplies power supply to the motor.