DICOM PS3.7 2019b - Message Exchange
D. Implementation Class UID Sub-Item Structure (A-ASSOCIATE-AC)

The Implementation Class UID Sub-Item shall be made of a sequence of mandatory fixed length fields followed by a variable field. Only one Implementation Class UID Sub-Item shall be present in the User Data Item of the A-ASSOCIATE-AC. Table D.3-2 shows the sequence of the mandatory fields.

Table D.3-2. Implementation UID Sub-Item Fields (A-ASSOCIATE-AC)

Item Bytes

Field Name

Description of Field






This reserved field shall be sent with a value 00H but not tested to this value when received.

3 - 4


This Item-length shall be the number of bytes from the first byte of the following field to the last byte of the Implementation-class-uid field. It shall be encoded as an unsigned binary number.

5 - xxx


This variable field shall contain the Implementation-class-uid of the Association-acceptor as defined in Section D.3.3.2. The Implementation-class-uid field is structured as a UID as defined in PS3.5.

DICOM PS3.7 2019b - Message Exchange