Acronym for “Unique  Identifier”. UID’s are widely used in DICOM and are assigned to objects, classes, transfer syntaxes, special services, and specific data elements. NEMA registers DICOM UID’s and every instance of a DICOM application should have a UID prefix that it can use to generate new UID’s from.

Transfer Syntax

Defines how data elements are serialized in three (3) aspects: (1) Byte order (Little/Big endian) (2) Explicit or Implicit Value Representation and (3) If and what type of compression is used for the image pixel data element. Represented as a pre-defined UID. Transfer syntax is negotiated for every service in the association setup phase and [...]