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. 2021 Feb 25;3(1):e200279. doi: 10.1148/ryct.2021200279

Figure 14d:

Fibrotic hypersensitivity pneumonitis. (a–c) Axial inspiratory CT scans demonstrate substantial ground-glass abnormality, mild centrilobular nodularity, and moderate mosaic attenuation, in addition to peribronchovascular and lower lung–predominant fibrosis. (d–f) Axial expiratory CT images confirm air trapping as the cause of mosaic attenuation. The degree of ground-glass abnormality, the degree of air trapping, and the peribronchovascular predominance of fibrosis would result in this case being categorized as most consistent with a nonidiopathic pulmonary fibrosis diagnosis.

Fibrotic hypersensitivity pneumonitis. (a–c) Axial inspiratory CT scans demonstrate substantial ground-glass abnormality, mild centrilobular nodularity, and moderate mosaic attenuation, in addition to peribronchovascular and lower lung–predominant fibrosis. (d–f) Axial expiratory CT images confirm air trapping as the cause of mosaic attenuation. The degree of ground-glass abnormality, the degree of air trapping, and the peribronchovascular predominance of fibrosis would result in this case being categorized as most consistent with a nonidiopathic pulmonary fibrosis diagnosis.