Fig. 4
From: Phenotyping COVID-19 respiratory failure in spontaneously breathing patients with AI on lung CT-scan

Correlation between CT derived parameters and gas exchange. Panel A: correlation between mean lung density and PaO2/FiO2; panel B: correlation between lung gas volume and PaO2/FiO2; panel C: correlation between lung weight and PaO2/FiO2; panel D: correlation between mean lung density and PaCO2; panel E: correlation between lung gas volume and PaCO2; panel F: correlation between lung weight and PaCO2. HU hounsfield units, PaO2/FiO2 ratio of arterial oxygen partial pressure to fractional inspired oxygen, PaCO2 arterial carbon dioxide partial pressure