General Purpose Performed Procedure Step

General Purpose Worklist provides tasks to be done, such as interpretation at a workstation, while managing their status so that multiple users can use the same pool of jobs.

The DICOM general purpose worklist (initially called Interpretation Worklist, but extended to generic usage) formalizes the exchange between workstations and an archive in a standard manner so that when a particular vendor supports the extension, other workstations can access the workflow data. The structure is very similar to the DICOM Modality Worklist and MPPS services, which provide the worklist and status information to a modality about exams scheduled and performed.

The new extension takes this one step further by providing a locking mechanism and scheduler to provide information about the exams to be read. A physician can request a list of exams to be read, issue a command to lock it, and then update the status. In addition, results such as reports or images can be specified. Implementing these services will loosen the tight connection that currently exists between viewing stations and the image manager/archive of the same vendor.

There are actually three different SOP Classes defined to achieve this functionality, in addition to a META SOP Class, which includes the functionality of all three SOP Classes.

One of these SOP Classes is the General Purpose Performed Procedure Step.

The General Purpose Performed Procedure Step is modeled after the Modality Performed Procedure Step (MPPS). It communicates the status of the job when finished as well as the results that are generated. This is done using the DICOM N_CREATE, N_SET and optional N_GET commands.



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