8
Diagnosis
Figure 5. CT Pattern Suggestive of an Alternative Diagnosis
for Lung Fibrosis
(A and B) Transverse CT sections obtained at deep inspiration showing disseminated lung
infiltration, sparing some secondary pulmonary lobules in lung bases. (C) Transverse CT section
obtained at expiration confirming lobular air trapping, all findings being highly suggestive of chronic
hypersensitivity pneumonitis.
Figure 6. Acute Exacerbation of IPF
(A and B) Transverse computed tomography sections obtained in the upper and mid lung zones and (C
and D) during acute exacerbation showing newly developed, bilateral ground-glass opacification in both
lungs on a background of usual interstitial pneumonia pattern.
