DICOM PS3.18 2020b - Web Services

11.3 Transactions Overview (Current)
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## 11.3 Transactions Overview

The Worklist Service consists of the Transactions in Table 11.3-1.

Table 11.3-1. Worklist Service Methods and Resource Templates

Transaction | Method | Payload | Description
--- | --- | --- | ---
Request | Success Response
Create | POST | dataset | none | Creates a new Workitem
Retrieve | GET | none | dataset | Retrieves the Target Workitem
Update | POST | dataset | none | Updates the Target Workitem
Change State | PUT | none | none | Changes the state of the Target Workitem
Request Cancellation | POST | dataset | none | Requests that the origin server cancel a Workitem
Search | GET | none | results | Searches for Workitems
Subscribe | POST | none | none | Creates a Subscription to the Target Worklist or Target Workitem
Unsubscribe | DELETE | none | none | Cancels a Subscription from the Target Worklist or Target Workitem

The details of all state transition requirements can be found in Section CC.1.1 “Unified Procedure Step States” in PS3.4.

The Request Cancellation transaction does not perform an actual state transition, but it might cause a state transition.

When creating a new Workitem, to convey the Workitem UID that is to be assigned, DIMSE uses the Affected SOP instance UID in the DIMSE header. In the Web Services, the Workitem UID is included as a Query Parameter to the Create request. All Attributes in the HTTP transaction payloads are the same as those in the DIMSE payload.

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DICOM PS3.18 2020b - Web Services