The sites listed here provide public domain images. Check any individual image to be assured that is in the public domain. Be sure to see the Privacy & Publicity Rights section of this guide.
The images in this collection are not copyrighted but credit should be given to the "Cogan Collection, NEI/NIH." See the image use information on the How To Use the Collection page.
This image library from the National Institute of Mental Health contains public domain images. Images should not be used to imply the endorsement by NIMH. See suggested information on the site for providing credit of the images.