Replacing header image on each page with the featured image

Hi

I want to delete the header image on each page and replace it with the featured image. Is this possible?

If not, is there a way I can have separate images for the 4 blocks of our services section which do not get repeated when one clicks on the link to it.

What happens is then I have 2 images on the pages – one the header, one the feature and then the text content below making the page look bulky.