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 Description SCP
LDicomNet::StartUp Initializes the DICOM DLL. This must be done before calling any DICOM operation functions, but only needs to be called once per application. LDicomNet::StartUp
LDicomNet::LDicomNet Creates a DICOM Network object. LDicomNet::LDicomNet
The SCP listens for incoming connection requests. LDicomNet::Listen
LDicomNet::Connect
sendcall.jpg

The SCU calls this function to connect to an SCP. This generates a call to this function on the SCP
LDicomNet::OnAccept
LDicomNet::OnConnect
receivecall.jpg

The SCP calls LDicomNet::CreateNet for each connection it accepts. This provides the SCP memory to store information about this specific connection. LDicomNet::Accept is called to accept the connection. This generates a call to this function on the SCU.
LDicomNet::LDicomNet
LDicomNet::Accept
DICOM Network Connection established
LDicomNet::SendAssociateRequest
sendcall.jpg

The SCU calls this function to request a DICOM Associate connection. This generates calls to these functions on the SCP.
LDicomNet::OnReceive
LDicomNet::OnReceiveAssociateRequest
LDicomNet::OnReceive
LDicomNet::OnReceiveAssociateAccept
or
LDicomNet::OnReceive
LDicomNet::OnReceiveAssociateReject
receivecall.jpg

The SCP calls LDicomNet::SendAssociateAccept to accept the DICOM Associate connection. This generates calls to LDicomNet::OnReceive and LDicomNet::OnReceiveAssociateAccept on the SCU. LDicomNet::SendAssociateReject is sent to reject the DICOM Associate connection. This generates calls to LDicomNet::OnReceive and LDicomNet::OnReceiveAssociateReject on the SCU.
LDicomNet::SendAssociateAccept
or
LDicomNet::SendAssociateReject
DICOM Associate Connection established
LDicomNet::SendCStoreRequest
sendcall.jpg

The SCU calls this function to request the storage of data. This generates calls to these functions on the SCP.
LDicomNet::OnReceive
LDicomNet::OnReceiveData
LDicomNet::OnReceiveCStoreRequest
LDicomNet::OnReceive
LDicomNet::OnReceiveData
LDicomNet::OnReceiveCStoreResponse
receivecall.jpg

The SCP calls this function to respond to the storage request. This generates calls to these functions on the SCU.
LDicomNet::SendCStoreResponse
LDicomNet::SendReleaseRequest
or
LDicomNet::SendAbort
sendcall.jpg

The SCP calls LDicomNet::SendReleaseRequest to request a release from the DICOM Associate connection. This generates calls to LDicomNet::OnReceive and LDicomNet::OnReceiveReleaseRequest on the SCP. This is the preferred method of closing a connection. LDicomNet::SendAbort can also be sent to close a connection. This generates calls to LDicomNet::OnReceive and LDicomNet::OnReceiveAbort on the SCP.
LDicomNet::OnReceive
LDicomNet::OnReceiveReleaseRequest
or
LDicomNet::OnReceive
[LDicomNet::OnReceiveAbort](LDicomNet-OnReceiveAbort.md
LDicomNet::OnReceive
LDicomNet::OnReceiveReleaseResponse
receivecall.jpg

The SCP calls this function to respond to the release request. This generates calls to the following functions on the SCU.
LDicomNet::SendReleaseResponse
LDicomNet::Close
sendcall.jpg

The SCU calls this function to close the DICOM Associate connection. This generates a call to this function on the SCP.
LDicomNet::OnClose
LDicomNet::ShutDown When the DICOM DLL is no longer needed, call this function to shut down the DLL and free all associated memory. This function should be called once for every call to LDicomNet::StartUp. LDicomNet::ShutDown
Help Version 22.0.2021.9.9
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS DICOM C++ Class Library Help
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.