Tidal volume monitoring by a set of tetrapolar impedance measurements selected from the 16-electrodes arrangement used in electrical impedance tomography (EIT) technique. Calibration equations in a group of healthy males. - Marco Balleza-Ordaz; Erick Andres Perez-Alday; Francisco Miguel Vargas Luna; Svetlana Kashina; Maria Raquel Huerta-Franco; L. A. Torres-González; P. J. Riu-Costa (Biomed. Signal Process. Control., 2016)