Fig. 2

Volumetry evaluated using computed tomography. a Left column. CT images of the thoracic cavity at the level of the left ventricle. Right column. Representative images obtained using "Analyze Particles" program. The "Bare Outline" is indicated by the black line. The area of the aerated field, that enclosed within the black lines, was analyzed with ImageJ. b The aerated volume was calculated by integrating the aerated area. The aerated volume was reduced by bleomycin-induced lung injury, and inhaling hydrogen preserved the aerated volume after bleomycin-induced injury. SA, saline administration and air inhalation, n = 6; SH, saline administration and hydrogen inhalation, n = 6; BA, bleomycin administration and air inhalation, n = 9, BH, bleomycin administration and hydrogen inhalation, n = 9. NS, not significant; *p < 0.05, **p < 0.01. Error bars: 95% CI