Figure 2.

Linear regression between EELV measurements by rebreathing of sulphur hexafluoride (EELV_SF6) and by computed tomography (EELV_CT) obtained in 25 ARDS patients. The dotted line is the regression line EELV_SF6 = 0.4EELV_CT + 0.3 (r² = 0.72; P < 0.001).