RAM

Random Access Memory. The temporary memory area on a computer that permits the user to run software, process images, and store information. The amount of RAM needed varies according to the application. Increasing the amount of RAM in a computer can improve computer performance. Information stored in the RAM is lost when the power is shut off.

Real Time

The capture, processing, and presentation of data, audio, and/or video signals at the time the data is originated on one end and received at the other end. When signals are received at rates of 30 frames per second, real time is achieved.

Resolution

Refers to the ability of a device to distinguish between various factors. For example, spatial resolution is the ability to distinguish between adjacent structures. Contrast resolution is the ability to discriminate between shades of gray.

RIS

Radiology Information System. A synthesized system for the electronic processing, storage and transmission of radiographic images. RIS allows the remote interpretation of radiographic image-teleradiology-and may be connected to Hospital Information Systems (HIS) and Laboratory Information Systems (LIS).

ROM

Read Only Memory. The permanent memory capacity for a computer. Programs and information stored in ROM are not lost when power is extinguished.

Routing

The assignment of a path of communication.

RTF

Rich Text Format. A series of word processing directions that are able to be read by the majority of word processing programs in order to retain the formatting rules of the document.