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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    ARDS on chest x-ray: phases


    • First week
    • First findings > 12 hours after insult
    • Patchy alveolar infiltrates
      • bilateral
      • gravity dependent, both central and peripheral
      • costophrenic angles are spared
      • air-bronchograms
      • Kerley lines are uncommon
    • Infiltrates coalesce to large dense air-space bilateral shadows



    • Begins as early as in the second week
    • Coarse reticular interstitial pattern, later fibrosis


    1. Lambert L. Unpublished notes.

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