Standard Role Definitions

admin
The admin role grants administrative privileges. It allows the user to access: It also allows the user to force a garbage collection on the System Properties page.
delete
The delete role grants the ability to delete studies or objects on QuarantineManager and FileStorageService pages.
guest
The guest role grants the ability to view studies on File Storage Service pages when the owner of the studies has included the user in the guest list for his studies. This role allows the administrator of a site to limit which users are considered to be possible guests, but the owner of the studies has ultimate control over which guests can view them.
import
The import role grants the ability to transmit objects to the HttpImportService or to query the DatabaseExportService's Verification Service (when the services are configured to require authentication).
proxy
The proxy role grants the ability to manage FileStorageService guest lists on behalf of other users. It is intended to be granted to patient assistants in situations where CTP is used to distribute studies to referring physicians.
qadmin
The qadmin role grants access to QuarantineManager pages.
read
The read role grants the ability to view all studies in the FileStorageService, whether the user owns the studies or not.
shutdown
The shutdown role grants the ability to shutdown the server from a browser on another computer. This role can only be granted to a user by a user who already has the role. Grant this role at your peril. It is intended for special situations. I wish I had never thought of it.