Diagram of an SCU-SCP Set-up

Diagram of an SCU-SCP Set-Up

The diagram given below shows a simple example of an SCU-SCP connection and a series of function calls used to transfer messages and data.

SCU		SCP

StartUp method	Create and initialize the DICOM Network handle.	StartUp method
	The SCP listens for incoming connection requests.	Listen method
Connect method	--------------------------------------------------> The SCU calls this method to connect to an SCP. This generates this event on the SCP	NetAccept event
NetConnect event	<-------------------------------------------------- The SCP calls StartUp for each connection it accepts. This provides the SCP memory to store information about this specific connection. The Accept method is called to accept the connection. This generates this event on the SCU.	StartUp method Accept method
	DICOM Network Connection established
SendAssociateRequest method	--------------------------------------------------> The SCU calls this method to request a DICOM Associate connection. This generates these events on the SCP.	NetReceive event NetReceiveAssociateRequest event
NetReceive event NetReceiveAssociateAccept event or NetReceive event NetReceiveAssociateReject event	<-------------------------------------------------- The SCP calls SendAssociateAccept to accept the DICOM Associate connection. This generates NetReceive and NetReceiveAssociateAccept events on the SCU. SendAssociateReject is sent to reject the DICOM Associate connection. This generates NetReceive and NetReceiveAssociateReject events on the SCU.	SendAssociateAccept method or SendAssociateReject method
	DICOM Associate Connection established
SendCStoreRequest method	--------------------------------------------------> The SCU calls this method to request the storage of data. This generates these events on the SCP.	NetReceive event NetReceiveData event NetReceiveCStoreRequest event
NetReceive event NetReceiveData event NetReceiveCStoreResponse	<-------------------------------------------------- The SCP calls this method to respond to the storage request. This generates these events on the SCU.	SendCStoreResponse method
SendReleaseRequest method or SendAbort method	--------------------------------------------------> The SCP calls SendReleaseRequest to request a release from the DICOM Associate connection. This generates the NetReceive and NetReceiveReleaseRequest events on the SCP. This is the preferred method of closing a connection. SendAbort can also be sent to close a connection. This generates the NetReceive and NetReceiveAbort events on the SCP.	NetReceive event NetReceiveReleaseRequest or NetReceive event NetReceiveAbort event
NetReceive event NetReceiveReleaseResponse	<-------------------------------------------------- The SCP calls this method to respond to the release request. This generates calls to the following events on the SCU.	SendReleaseResponse method
Close method	---------------------------------------------------> The SCU calls this method to close the DICOM Associate connection. This generates this event on the SCP.	NetClose event