Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

You will find here:

that are used in radiology and related fields with free access.


  • Some pages are accompanied by illustrations
  • All pages contain tags for easy navigation

The concept

The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

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    Idiopathic interstitial pneumonia - classification by the American Thoracic Society (ATS) and the European Respiratory Society (ERS)

    This multidisciplinary concensus was adopted in 2001 by both the American Thoracic Society (ATS) and the European Respiratory Society (ERS) in order to standardize classification of the idiopathic interstitial pneumonias.

    Name Interstitial pulmonary fibrosis Non-specific interstitial pneumonia Cryptogenic organising pneumonia Acute interstitial pneumonia Desquamative interstitial pneumonia Respiratory bronchiolitis - Interstitial lung disease Lymphoid interstitial pneumonia
    Histological pattern UIP NSIP OP DAD DIP RB LIP
    Radiographic features reticular pattern, basal ground-glass, reticular pattern patchy bilateral consolidation diffuse ground-glass and/or consolidation ground-glass bronchial wall thickening, ground-glass reticular opacity, nodules
    Distribution on CT peripheral, subpleural, basal peripheral, subpleural, lower zone, basal subpleural, peribronchial diffuse lower zone, peripheral diffuse diffuse
    CT findings reticular pattern, honeycombing, traction bronchiectasis, architectural distortion, focal ground-glass ground-glass, irregular reticular pattern patchy bilateral consolidation or nodules consolidation and ground-glass, often lobular sparing ground-glass, reticular lines bronchial wall thickening, centrilobular nodules, patchy ground glass centrilobular nodules, ground glass, septal and bronchovascular thickening, thin-walled cysts


    1. American Thoracic Society/European Respiratory Society International Multidisciplinary Consensus Classification of the Idiopathic Interstitial Pneumonias: This Joint Statement of the American Thoracic Society (ATS), and the European Respiratory Society (ERS) was adopted by the ATS Board of Directors, June 2001 and by The ERS Executive Committee, June 2001. American Journal of Respiratory and Critical Care Medicine. 2002 Jan 15;165(2):277–304
    2. Clinical Atlas of Interstitial Lung Disease. Springer; 2007.

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