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. 2022 Sep 9;42(7):1925–1939. doi: 10.1148/rg.220073

Figure 2.

Various extents of lung abnormality in four patients. Original axial CT images (A, C, E, G) and the same CT images with a segmented overlay of ILA (B, D, F, and H) are shown. (A, B) Scans in a 76-year-old woman show subtle subpleural ground-glass abnormality that accounts for 2.9% of the lung area, indicating insignificant abnormality. (C, D) Scans in an 84-year-old woman show ground-glass and reticular abnormalities that account for 6.7% of the lung area, indicating significant abnormality. (E, F) Scans in a 73-year-old woman show faint ground-glass abnormality that accounts for 10.6% of the lung area, indicating significant abnormality. (G, H) Scans in a 60-year-old woman show widespread ground-glass abnormality that affects 26.2% of the lung area, indicating significant abnormality. The segmentations shown were performed manually by using 3D Slicer software (Brigham and Women’s Hospital, Harvard Medical School, Boston, MA).

Various extents of lung abnormality in four patients. Original axial CT images (A, C, E, G) and the same CT images with a segmented overlay of ILA (B, D, F, and H) are shown. (A, B) Scans in a 76-year-old woman show subtle subpleural ground-glass abnormality that accounts for 2.9% of the lung area, indicating insignificant abnormality. (C, D) Scans in an 84-year-old woman show ground-glass and reticular abnormalities that account for 6.7% of the lung area, indicating significant abnormality. (E, F) Scans in a 73-year-old woman show faint ground-glass abnormality that accounts for 10.6% of the lung area, indicating significant abnormality. (G, H) Scans in a 60-year-old woman show widespread ground-glass abnormality that affects 26.2% of the lung area, indicating significant abnormality. The segmentations shown were performed manually by using 3D Slicer software (Brigham and Women’s Hospital, Harvard Medical School, Boston, MA).