18
Figures
Figure 9. Spectrum of CT Appearances in UIP Pattern Due
to HP
A) Coronal CT section obtained at deep inspiration showing honeycombing with traction
bronchiolectasis in the peripheral part of the right lower lobe (thin arrows) and numerous
hyperlucent lobules in the le lower lobe (thick arrows).
B) Lobular air trapping was confirmed on expiratory CT. HP-UIP should be considered when fibrosis
and honeycomb cysts predominate in the upper or mid lungs, when mosaic attenuation or three-
density sign are present or when the fibrosis appears diffuse in the axial plane.
A)
B)
