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. 2022 Jun 30;163(1):164–175. doi: 10.1016/j.chest.2022.06.030

Figure 1.

Figure 1

Representative CT scan images of patients with quantitative interstitial abnormality (QIA) progression. A and B, A patient with no visible QIAs at baseline (A) who developed subtle evidence of QIAs at the bilateral bases after 5 years of follow-up (B). The percentage of this patient’s lung occupied by QIAs increased by 8.5% over 5 years, and he died approximately 6 months after his second CT scan was acquired. C and D, A patient with visually defined interstitial lung abnormalities (ILAs) at baseline (C) who showed progression of QIAs over the 5 years of follow-up (D). The percentage of this patient’s lung occupied by QIAs increased by 11.6% over the 5 years of follow-up, and he died shortly after his follow-up CT scan.