The ADT system registers and/or admits a patient and forwards the information to other information systems.
                            

The Order Placer informs the Order Filler of the initiation or cancellation of an order. The Placer/Filler Order Management transaction will sometimes be referred to as -New when a new order is being initiated, or as -Cancel when an existing order is canceled.
                            

The Order Filler informs the Order Placer of the initiation, cancellation, or change in the status of an order. The Placer/Filler Order Management transaction will sometimes be referred to as -New when a new order is being initiated, or as -Cancel when an existing order is canceled.
                            

Schedule information is sent from the Department System Scheduler/Order Filler to the Image Manager.
                            

Based on a query entered at the Acquisition Modality, a modality worklist is generated listing all the items that satisfy the query. This list of Scheduled Procedure Steps with selected demographic information is returned to the Acquisition Modality.
                            

An Acquisition Modality notifies the Performed Procedure Step Manager of the start of a new Procedure Step and the PPS Manager informs the Department System and Image Manager.
                            

An Acquisition Modality notifies the Performed Procedure Step Manager of the completion of a Procedure Step and the PPS Manager informs the Department System and Image Manager.
                            

An Acquisition Modality sends acquired or generated images to the Image Archive.
                            

An Acquisition Modality sends acquired or generated images to the Image Archive.
                            

An Acquisition Modality or Image Creator requests that the Image Manager take responsibility for the specified DICOM objects (images, GSPS objects, Key Image Notes, Evidence Documents or any combination thereof) that the requestor stored in the Image Archive.
                            

The Department System Scheduler/Order Filler asks the Image Manager if a particular image or image series is available.
                            

The ADT Patient Registration System informs the Order Placer and the Department System Scheduler/Order Filler of new information for a particular patient. The Department System Scheduler may then further inform the Image Manager.
                            

The Department System Scheduler/Order Filler sends the Image Manager updated order or procedure information.
                            

An Image Display queries the Image Archive for a list of entries representing images by patient, study, series, or instance.
                            

An Image Display queries the Image Archive for a list of entries representing image Grayscale Softcopy Presentation States (GSPS) by patient, study, series, or instance.
                            

An Image Creator sends new images to the Image Archive.
                            

An Image Creator requests that the Image Archive store the created Grayscale Softcopy Presentation State objects.
                            

An Image Creator notifies the Performed Procedure Step Manager of the start of a new Procedure Step and the PPS Manager informs the Department System and Image Manager.
                            

An Image Creator notifies the Performed Procedure Step Manager of the completion of a Procedure Step and the PPS Manager informs the Department System and Image Manager.