How can I reference images in a rich text field? I need to reference an image in a rich text field separately to the text. 

So I can't just use {{entry.body}} I need to be able to do {{entry.body.image}} or something comparable. 

How can I do something like this?

Hopefully my question makes sense, I am new to Craft.

Thanks!
Sounds like you are coming from something like WordPress. In Craft there are asset fields where you can relate assets to your text. Together with matrix fields you can create a powerful layout rather than inserting everything into one huge wysiwyg.

If you really want to fetch images in html editors you'll need a plugin for that. It's not possible in Craft per default because it's not really the intended way