Set div background in jQuery ajax success from an image response

I have a controller action that I am going to request. The response is as follows.

return send_file(@image_path,
  :disposition => 'inline',
  :filename => @image.title,
  :type => @image.content_type)

What I want to achieve is, in my ajax success function, I would like to call a div and set its background to this response image. How can I achieve this.