A device designed to be adhered to a patient’s thoracic region to aid in the correct placement and positioning of cutaneous electrodes during breast electrical impedance (bioimpedance) spectroscopy [EIS/BIS], thoracic tomography (EIT) or segmentography procedures. It is available in various shapes (e.g., skin-adhesive star, belt) designed to better fit the contours of a patient’s chest and/or breast. This is a single-use device.