Reference Region

A region of interest in an image chosen for comparison purposes because its uptake properties have some desired feature. (NCI Thesaurus)

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Reference range

In medicine, a set of values that a doctor uses to interpret a patient’s test results. The reference range for a…

Reference Point

A specified location to which measurements are referred.

Reference Period

A time frame that is of value for its relationship to a notable event.

Reference Object

Something referred to; the object of a reference.

Reference interval

In medicine, a set of values that a doctor uses to interpret a patient’s test results. The reference interval for a…

Reference Information Model

An object oriented information model to harmonize the definition of HL7 messages across different application domains.