Hello Stuart,
You can definitely track the # of clicks of an Image by using JavaScript. You can reference this resource:
http://www.w3schools.com/tags/tag_map.asp I've never really done this specifically, however I know that you can embed JavaScript into OnClick and HREF events in HTML.
Again this is something that you'll need to configure as a custom field using Text/HTML question type. Dynamic Forms doesn't have a Question type that assists in this type of functionality.
Let me know if you have any questions.
Thanks,
Ryan