HRCT features in ILDs

HRCT scans show diverse features which, individually or in combination, can indicate the presence of a certain type of disease.

In diagnosing ILDs, there are 4 general features to be considered that indicate the presence of pathological abnormalities on HRCT scans and are important to the interpretation of HRCT scans:2

  1. Reticular abnormalities
  2. Nodules
  3. Increased lung opacity (high attenuation)
  4. Decreased lung opacity (low attenuation)

Further consideration of potential co-occurrence/overlap of features, additional findings and the distribution of abnormalities in the axial and coronal planes can help narrow the differential diagnosis.8