Some of the images listed on this site are in the public domain, but not all. Before using any image look for a note about copyright. Using images without citing them is considered plagiarism. Also, keep in mind that anything that is published is automatically copyright protected whether it contains the symbol or not. You may be required to ask for permission and possibly to pay a fee before you can use images for publications or presentations. Images that are "free to copy" often have a note on them that states that they fall under a Creative Commons License or are in the public domain.
University of Iowa affiliates -- If you’d like help finding medical pictures on a particular subject, or making a page listing sites in a subject, contact Eric Rumsey.