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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Radiat Res. 2011 Oct 20;176(6):770–780. doi: 10.1667/rr2562.1

FIG. 4.

FIG. 4

Measurements of fibrosis in the lungs of the rats at time of euthanasia at 36 weeks after irradiation. Panel A: Hydroxyproline (μg of hydroxyproline/100 mg of wet lung tissue) content of the lung tissue. Panel B: Recently synthesized collagen (μg of soluble collagen/600 μg of wet lung tissue). Each bar represents the mean ± SEM for all rats available for analysis. Labeling of the treatment groups is as indicated in the legend to Fig. 2. Twelve-week controls animals were euthanized at the start of the experiment; 36-week controls were euthanized at 36 weeks postirradiation. The asterisks indicate groups that are significantly different from the whole-lung irradiation groups in each panel.