Q: What is Openi?
A: OpenI is the service of the National Library of Medicine that enables search and retrieval of abstracts and images (including charts, graphs, clinical images, etc.) from the open source literature, and biomedical image collections. Searching may be done by text queries as well as by query images. OpenI provides access to over 1.6 million images from about 580,000 PubMedCentral articles and 7,470 chest x-rays with 3,955 radiology reports.

Q: Are the images in OpenI in the public domain? May I use a particular image for my project?
A: All images in OpenI are from the Open Access Subset of PubMed Central (PMC), a free full-text archive of biomedical and life sciences journal literature at the U.S. National Library of Medicine.

Please refer to the following web page for information on the open access subset:

Please refer to the following web pages for information on copyright:

PMC Copyright Notice

Creative Commons License

Copyright Information & Downloading National Library of Medicine Data

Q: Can I drag and drop images in Internet Explorer?
A: No, Internet Explorer does not support this feature. Chrome, Firefox, and Safari allow drag and drop.

Q: How do I drag and drop with browsers other than Internet Explorer?
A: Drag the image file onto the Open-i search or results page to initiate an image search. Supported file types supported are .jpeg, .jpg, .gif and .png.

Q: What is the difference between the Citation List view and Image Grid?
A: The citation list view shows the best match image on the left along with citation information on the right, ten items to a page.  The grid view displays one or more images from an article, twenty items to a page.  You may switch between views by clicking on the appropriate icon next to “View as” on the right of the top results bar.

Q: How do I rank my results by date?
A: Open the Rank By section on the left side bar by clicking on the side arrow.  Click on newest or oldest. This only gives more weight to the date, it isn't date sorted.

Q: How do I use limits?
A: By default, no limits are applied to the search.  All image types, subsets, and specialties are searched.  Text is searched in all fields.  Results are ranked in relevance order.

Q: How do I open “View Article” results in a new window?
A: Control-Click on the link to open and view the article in a new browser window.

Q: How do I open “View Similar Images In” results in a new window?
A: Control-Click on the link to open and view the results in a new browser window.

Q: When my browser window is narrow I lose the View Similar Images and View Article links in list view?
A: You are in mobile mode at that point. Click, tap, or swipe the three vertical dots to view those links.

Q: In Chrome, my video doesn't play somtimes, what do I do?
A: We have a known issue for some videos in Chrome. Please do a ctrl-shft-r to refresh the page and the video will play.