Hi tuttlephoto,
The only way I can think of doing that would be to replace the image for each unique page id with some javascript. So in the themes js>avia.js file, you would look for this line:
jQuery.noConflict();
jQuery(document).ready(function(){
Then add this after it for each page and image add:
jQuery("#top.page-id-19 h1.logo.bg-logo").find('img').attr('src', ['http://www.lifelonghealthandhappiness.com/wp-content/uploads/2013/02/TwoGirlsinField.jpg']);
Where the page-id-19 is unique to that specific page and the url is for the image you want to replace the default one on that page.
There will be a delay as the javascript loads the new image in, but as I said, this is the only way I know of to that without writing some php conditional statements for each page as well.
Regards,
Devin