<div style="background-image:url('http://goo.gl/Ob6X');">test background image for post title</div>
BTW original image url is very long
but shortened by Google Short URL service to
which then enabled me to keep the number of characters below 150 characters including space.
This post was inspired by a blogger's comment in How to change post title background color:
"thanx for sharing this..
but instead of color..how about to add image for background?"