RADIOLOGY INFORMATION SYSTEM. A system comprised of patient registration, film/chart tracking, scheduler, management reports, and other tools designed to increase the efficiency of radiology offices.
Rail Interface System. An accessory package originally designed by Knight's Armament for the M4 carbine, the RIS's versatility has led it to be adapted to several weapons platforms. The RIS consists of several accessory rails in place of a conventional foregrip; various accessories from grips to aiming devices can be mounted to the shooter's liking.
Radiology Information System. A computer system which stores the appointment information for a radiology department and may be linked to the HIS. A PACS may take exam booking information and demographics from the RIS to form worklists. See Hospital Information System (HIS) and Worklist.