Get the URL of a HotLinked image

[eluser]tank6b[/eluser]
Hi All,

Thanks to the great community here I have managed to solve one issue, now I have other one:
How I can know the url that is hotlinking a image I'm serving inside CI.

So the image I'm serving like this
http://ellislab.com/forums/viewthread/73281/

Now I want to know what pages are displaying the image.

Thanks in advanced