Table 3. Radiological features of idiopathic pulmonary fibrosis
UIP pattern (all four features)Possible UIP pattern (all three features)Inconsistent with UIP pattern (any one of seven features)
Subpleural basal predominanceSubpleural basal predominanceUpper or mid-lung predominance
Peribronchovascular predominance
Reticular abnormalityReticular abnormalityExtensive ground-glass abnormality (extent greater than reticular abnormality)
Profuse micronodules (bilateral, predominantly upper lobes)
Honeycombing with or without traction bronchiectasisDiscrete cysts (multiple bilateral, away from areas of honeycombing)
Diffuse mosaic attenuation/air trapping (bilateral in three or more lobes)
Absence of features listed as inconsistent with UIP patternAbsence of features listed as inconsistent with UIP patternConsolidation in bronchopulmonary segment(s)/lobe(s)
  • UIP: usual interstitial pneumonia. Reproduced and modified from [11] with permission from the publisher.