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Fig. 1 | BMC Pulmonary Medicine

Fig. 1

From: A comparison of visual and quantitative methods to identify interstitial lung abnormalities

Fig. 1

A density plot of the percentage of the lung occupied by High Attenuation Areas (HAAs, chest CT attenuation values between −600 and −250 HU) in participants with ILA (in red, n = 163), in participants indeterminate for ILA (in gray, n = 757), and in the participants without ILA (in black, n = 1173). Despite the differences in numbers between the groups for each category (defined by color) the area under the curve is normalized to a density of 1 which gives a sense of the relative spread of the data between categories. The percentage of lung occupied by various HAA thresholds is listed on the x-axis. The density of subjects at various HAA thresholds is listed on the y-axis

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