Image Resources approved for use

I'm curious about which images we're allowed to use for our personal applications. I know that we get icons such as {"thumbnail":"kilrogg/100/32554340-avatar.jpg"} and this corresponds to
http://us.battle.net/static-render/us/kilrogg/100/32554340-avatar.jpg

But I've been able to locate other images such as
http://us.battle.net/static-render/us/kilrogg/100/32554340-profilemain.jpg
http://us.battle.net/static-render/us/kilrogg/100/32554340-inset.jpg
http://us.battle.net/static-render/us/kilrogg/100/32554340-card.jpg

and wondered if as community developers, it was okay to use these as well. The images seem to follow the same format, just have a different designation.