Custom Header Icon in the right header position

Hi,

I’m trying to find how to put custom icon image, such as CI or UI, into header right position. In the widget, there is header right widget, but custom image widget does not allowed. And, header in appearance panel, this is for full header size image, 960×250 pixels. My image is 576×219 pixels and I want to make it smaller.

I just want to put custom image into header right position.
Is it possible?