How do I add an image to an item in RSS 2.0?

Is there a way to send only an Image with a link and some alt text for each item in an RSS feed?

I looked at the enclosure tag but this is only for videos and music.

One of solutions is to use CDATA in description

<![CDATA[
  Image inside RSS
  <img src="http://example.com/img/smiley.gif" alt="Smiley face">
  ... further content ...   
]]>       

Note, that you may have a problem with hotlink prevented site.