Fig 4.

Specific regional pulmonary perfusion in regions of equal lung mass from ventral to dorsal determined by positron emission tomography/CT and ⁶⁸Ga-labelled microspheres. Symbols and horizontal lines represent median and inter-quartile ranges. Global statistical significance was accepted at P<0.05, Bonferroni–Holm adjustment for multiple testing. Differences between Day 1 and Day 2 within the same group and same region were tested with Wilcoxon tests (depicted P-values). No differences were found between groups VV and NV (Mann–Whitney U-test). n=7 per group. VV, variable ventilation; NV, nonvariable ventilation; Day 1, before randomisation; Day 2, 24 h after randomisation.