Radiopaedia is a wiki-based international collaborative radiology educational web resource containing reference articles, radiology images, and patient cases. It is a business owned by Investling, gaining revenue from ads and paid subscription. It also contains a radiology encyclopedia. It is currently the largest freely available radiology related resource in the world with more than 25,500 patient cases and over 10,300 collaborative articles on radiology-related topics, which are of varying quality.  The open edit nature of articles allows radiologists and trainees to modify and refine most content through time.
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