| DICOM PS3.4 2024e - Service Class Specifications |
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SCUs and SCPs of Storage SOP Classes operate on SOP Instances specific to the SOP Class. They may use the SOP Class Extended Negotiation Sub-Item defined in PS3.7. This Sub-Item allows DICOM AEs to exchange application information specific to SOP Class specifications. This is achieved by defining the Service-class-application-information field.
SCUs may use the SOP Class Common Extended Negotiation Sub-Item defined in PS3.7. This Sub-Item allows DICOM AEs to exchange information about the nature of the SOP Classes.
The SOP Class Extended Negotiation Sub-Item and SOP Class Common Extended Negotiation Sub-Item negotiation is optional for storage based SOP Classes.
The following negotiation rules apply to all DICOM SOP Classes and Specialized SOP Classes of the Storage Service Class.
The Association-requestor (Storage SCU role) in the A-ASSOCIATE request shall convey:
one Abstract Syntax, in a Presentation Context, for each supported SOP Class of the Storage Service Class
optionally, one SOP Class Extended Negotiation Sub-Item, for each supported SOP Class of the Storage Service Class
optionally, one SOP Class Common Extended Negotiation Sub-Item, for each supported SOP Class of the Storage Service Class
The Association-acceptor (Storage SCP role) in the A-ASSOCIATE request shall accept:
At the time of Association establishment implementations may exchange information about their respective capabilities, as described in PS3.7 and PS3.8. SCUs and SCPs may use the SOP Class Extended Negotiation Sub-Item Structure as described in Section D.3.3.5 in PS3.7 to exchange information about the level of conformance and options supported. SCUs may use the SOP Class Common Extended Negotiation Sub-Item defined in Section D.3.3.6 in PS3.7 to exchange information about the nature of the SOP Classes.
Extended Negotiation is optional. In the event that either the SCU or the SCP does not support Extended Negotiation, the defaults shall apply.
The SOP Class Extended Negotiation Sub-Item is made of a sequence of mandatory fields as defined by PS3.7. Table B.3-1 shows the format of the Service-class-application-information field of the SOP Class Extended Negotiation Sub-Item for SOP Classes of the Storage Service Class in the A-ASSOCIATE-RQ.
Table B.3-1. Service-Class-Application-Information (A-ASSOCIATE-RQ)
The SOP Class Extended Negotiation Sub-Item is made of a sequence of mandatory fields as defined by PS3.7. Table B.3-2 shows the format of the Service-class-application-information field of the SOP Class Extended Negotiation Sub-Item for SOP Classes of the Storage Service Class in the A-ASSOCIATE-AC.
Table B.3-2. Service-Class-Application-Information (A-ASSOCIATE-AC)
SOP Class Common Extended Negotiation Sub-Item allows the SCU to convey the Service Class UID of each proposed SOP Class.
A limited set of Standard SOP Classes in the Storage Service Class are defined to have one or more Related General SOP Classes. The Related General SOP Classes may be conveyed using the SOP Class Common Extended Negotiation during association establishment as defined in PS3.7. Table B.3-3 identifies which Standard SOP Classes participate in this mechanism. If a Standard SOP Class is not listed in this table, Related General SOP Classes shall not be included in a Related Storage SOP Class Extended Negotiation Sub-Item.
Implementation-defined Specialized SOP Classes (see PS3.2) of the Storage Service Class may convey a Related General SOP Class.
| DICOM PS3.4 2024e - Service Class Specifications |
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