This site is targeted at medical and radiology professionals, contains user contributed content and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use. is a free educational radiology resource with one of the web's largest collections of radiology cases and reference articles.

Case of the Day


Posterior ankle impingement syndrome

Os trigonum is a known predisposing factor for the development of chronic mechanical ankle pain. 

What is ?

Radiopaedia is a rapidly growing open-edit educational radiology resource which has been primarily compiled by radiologists and radiology trainees from across the world. Our mission is to create the best radiology reference, and to make it available to for free and forever... read more

How to get involved

If you are new to or interested in contributing or collaborating for the first time, we recommend familiarisation with a few initial steps.

The following YouTube screencast tutorials cover the very basics in creating articles and cases:

If you just want to have a practice on how editing works - do have a play in our "sandbox" page

More... is more than just a reference site.

  • radiopaedia courses: we have started to run various courses; attend in person or online. 
  • radiology channel: our youtube channel which contains video tutorials on various topics
  • radiology signs tumblr blog: high quality radiological signs added on Monday, Wednesday and Friday
  • playlists: collate, group or share your favourite cases from either your own case library or from others 
  • tumblr feed: a dedicated tumblr feed for the site
  • iOS radiology teaching files: contains collections of cases with questions, illustrations, answers as well as relevant articles with pathology 
  • twitter feed and facebook page: includes the case of the day and other information about the site and organisation
  • pinterest board: a dedicated pinterest board
  • instagram page: projects interesting images through instagram
  • collaborative publications: a great way to team up with other users and submit posters and publications for international conferences and journals
  • the radiopaedia blog: subscribe to upcoming events and comment on discussions

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