Figure 2From: Reliability of the nitrogen washin-washout technique to assess end-expiratory lung volume at variable PEEP and tidal volumesRelationship between EELV WI-WO and EELV CT . Each symbol represents a concomitant measurement of end-expiratory lung volume assessed with either nitrogen washin-washout technique (EELVWI-WO) or computed tomography (EELVCT). Solid line is the regression line. Dashed line is the line of identity.Back to article page