C DICOM Addressing (Normative)
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# C DICOM Addressing (Normative)

## C.1 DICOM Application Entity Titles

A DICOM Application Entity Title uniquely identifies a service or application on a specific system in the network. Application Entity Titles are independent of network topology so a device may be physically moved while its corresponding Application Entity Title may remain the same. See PS3.5 for the encoding of DICOM Application Entity Titles.

### Note

DICOM Application Entity Title was called Logical Address in the ACR-NEMA Standard.

DICOM Application Entity Titles are used in three instances of communication:

1. to identify the Called/Calling Application Entities. They are used to establish an association and to ensure that the association is established with the expected application.

2. to identify the originator and intended destination of DICOM Retrieve Services (see PS3.4). They are conveyed in DICOM Commands with messages of the DIMSE C-MOVE and C-STORE Services exchanged over an established association.

3. to identify the location of a Retrieve Service SCP for one or more SOP Instances. They are conveyed in DICOM DataSets of various services.

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