Value Representation

UI Unique Identifier (UID)

Category
string
Max Length
64 chars
Fixed Length
No
Source
PS3.5 §6.2

Definition

A character string containing a UID that is used to uniquely identify a wide variety of items. The UID is a series of numeric components separated by the period character (".").

Attributes using UI

104 DICOM attributes declare this VR. Showing the first 24.

Working with UI in integration code

VR-aware transformations are where most DICOM integration bugs hide — truncating a PN's 5-component structure, misaligning OB padding, or dropping leading zeros on IS. Saga IT builds production DICOM pipelines that respect VR semantics across Mirth Connect transformers, DIMSE gateways, and cloud DICOM services.