Fig. 6. Comparison of the ventilation distribution across the 32 rows of the tidal image electrical impedance tomography (EIT) (ventral = 1, dorsal = 32) before (AWAKE) and after (BEGIN) induction of general anesthesia. Groups pressure-controlled ventilation and pressure support ventilation depict a significant ventral shift of the ventilation, as indicated by the center of ventilation. COV = center of ventilation; PCV = pressure-controlled ventilation; PSV = pressure support ventilation; SB = spontaneous breathing.