The extension Start adds the new content element "Page Media" to TYPO3.
This content element is very usefull for header images.
"Page Media" displays the first image of the field media of the current page.
If there isn't any record, it slides in the page tree to the top. If page of one of the next levels has a media record, the record of the nearest page will displayed.
Please refer Administrators > Best Practice > Page Media