Setting up images for catagories

I have gotten a new blog set up, and I’m looking to set up the categories for the site so that categories have images associated to them, so that, for example, if I’m doing an article in an “Indiana Jones” Category, then in the upper right-hand corner of the article will have, say, picture of Indy’s hat, indicating the category, so that people reading the site will be able to tell at a glance that it’s related to Indiana Jones. Is there a way to do this as is?