Do you mean pay per page impressions? As I know adsense is not a program that pays you for page impressions.
If you have quality content, you will have good visitors and you WILL get good revenue off adsense - someone would click on your ads for sure...
most of the image ads are pay per visit. so try to have one, but it is in google hand to show cpm ads in your site. if you really want cpm ads then try cpm networks. my favorite network is adsdaq.
Put adense images, some of them paid CPM but very less If you would like to get paid per impression, go for adbrite