ReSharper Custom Pattern to Ignore Path Not Found Warning

How can I configure ReSharper to ignore the following Path Not Found Error?

<img src="icon.ashx?name=navLeft&size=24" alt="">

The warning is "Path icon.ashx not found". The format for the path is "icon.ashx?name={0}&size={1}".

Can I add a custom pattern in ReSharper options to hide this warning for the entire application? if so, what would the Search Pattern look like?