(RSNA) - Scientific society of radiologists and medical physicists.

(RIS) Radiology information system means a computer system that stores and processes the information for a radiology department and can be linked to the hospital information system.
The principal purpose of a RIS consists of taking over the general functions of the administration inclusive planning, monitoring and communication of all data regarding patients and its investigations in the radiology. The correct images should reach, at the correct time, the correct users. For this reason the RIS must contain a workflow management in order to simplify and steer the data flow at the individual view stations or devices (laser cameras etc.). The Radiology Information System is optimally complemented with a Picture Archiving and Communication System (PACS).

RIS Tasks:

The range is the measurable set of numbers between the limits of the maximum and minimum values.

Range gating utilized the selection of a returning ultrasound wave according to its depth by receiver activation at the appropriate time delay. The ultrasonic signal is selected by the range gate.

The range resolution is the ability to determine the depth of reflectors.