Using Flying Saucer to Render Images to PDF In Memory

I'm using Flying Saucer to convert XHTML to a PDF document. I've gotten the code to work with just basic HTML and in-line CSS, however, now I'm attempting to add an image as a sort of header to the PDF. What I'm wondering is if there is any way whatsoever to add the image by reading in an image file as a Java Image object, then adding that somehow to the PDF (or to the XHTML -- like it gets a virtual "url" representing the Image object that I can use to render the PDF). Has anyone ever done anything like this?

Thanks in advance for any help you can provide!