DICOM PS3.7 2018b - Message Exchange

D.3.3.4.2 SCP/SCU Role Selection Sub-Item Structure (A-ASSOCIATE-AC)
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##### D.3.3.4.2 SCP/SCU Role Selection Sub-Item Structure (A-ASSOCIATE-AC)

The SCP/SCU Role Selection Sub-Item shall be made of a sequence of mandatory fields. This Sub-Item is optional and if supported, one or more SCP/SCU Role Selection Sub-Items may be present in the User Data Item of the A-ASSOCIATE-AC. Table D.3-10 shows the sequence of the mandatory fields.

Table D.3-10. SCP/SCU Role Selection Sub-Item Fields (A-ASSOCIATE-AC)

Item Bytes | Field Name | Description of Field
--- | --- | ---
1 | Item-type | 54H
2 | Reserved | This reserved field shall be sent with a value 00H but not tested to this value when received.
3-4 | Item-length | This Item-length shall be the number of bytes from the first byte of the following field to the last byte of the SCP Role field. It shall be encoded as an unsigned binary number.
5-6 | UID-length | This UID-length shall be the number of bytes from the first byte of the following field to the last byte of the SOP-class-uid field. It shall be encoded as an unsigned binary number.
7-xxx | SOP-class-uid | This variable field shall contain the SOP Class UID or Meta SOP Class UID that may be used to identify the corresponding Abstract Syntax for which this Sub-Item pertains. It shall be encoded as a UID as defined in PS3.5.
xxx | SCU-role | This byte field shall contain the SCU-role as defined in Section D.3.3.4. It shall be encoded as an unsigned binary and shall use one of the following values: 0 - The Association-acceptor rejects the Association-requester's proposal of the SCU role selection 1 - The Association-acceptor accepts the Association-requester's proposal of the SCU role selection
xxx | SCP-role | This byte field shall contain the SCP-role as defined for the Association-acceptor in Section D.3.3.4. It shall be encoded as an unsigned binary and shall use one of the following values: 0 - The Association-acceptor rejects the Association-requester's proposal of the SCP role selection 1 - The Association-acceptor accepts the Association-requester's proposal of the SCP role selection

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DICOM PS3.7 2018b - Message Exchange