Fig. 4
From: Chest dual-energy CT to assess the effects of steroids on lung function in severe COVID-19 patients
HU distribution for pulmonary gas volume map and blood volume maps, separately for the No-Steroids group (n = 17 patients; Panel A) and the Steroids group (n = 43 patients; Panel B). Above: the HU distribution for pulmonary gas volume maps in the whole lung parenchyma; middle: HU distribution for pulmonary blood volume maps in the whole lung parenchyma; below: HU distribution for pulmonary blood volume maps in the hypoinflated lung parenchyma. x-axis: HU values. y-axis: percent of voxels compared to the total amount of voxels. Values represented as mean ± standard deviation (SD) or percent. *: for statistical differences between whole lung parenchyma (middle) and hypoinflated parenchyma (Below); †: for statistical differences between the No-Steroids group (Panel A) and the Steroids group (Panel B)