How to perform a C-MOVE-CANCEL?

[Zsolt Zimmermann]

Hi!

Is there a way to execute a C-MOVE-CANCEL request during C-MOVE operations to the SCP? If yes, how?

Thank you.

Cina

[Colby Dillion]

The library does not currently support C-Cancel requests. This has been looked at in the past, but until we come up with a clean and easy way to implement and use this functionality it will not be implemented in the library.

Colby

[Zsolt Zimmermann]

Hi!

Thank you for the answer. The reason I asked this is that I have very large XA angiographic sequences usually 10 or more in a study which takes up 100-200 MB in whole or more. If user wants to cancel the transfer in action I would like to use a clean solution of your library. Is it a reasonable workaround to shut down the C-STORE SCP class to stop the transfer and wait till the timeout elapsed to bring back it online?

Thank you.

[Mahesh Dubey]

I had not heard anyone using C-Cancel to cancel the C-Store operation. C-Cancel  mostly used in query retrieve, to cancel the Find and Move. But also it is no where written that you cannot use it with other  services. 

As a quick solution you can issue abort command to abort the association with that particular client at any instance.

Thanks And Regards

Mahesh Dubey

[Zsolt Zimmermann]

Maybe I didn't phrase my question correctly as I was talking about a C-MOVE operation. On the client part (SCU) it is a C-STORE suboperation but the MOVE is issued by the SCU and performed by the SCP. To cancel the operation according to standard I need to issue a C-MOVE-CANCEL to the SCP. Never mind I solved this with your suggestion to create a AAbort class and send it to the SCP with DicomService.SendAbort method. This is great!

According to the DICOM standard:

C.4.2.2.1 Baseline Behavior of SCU
An SCU conveys the following semantics with a C-MOVE request:

The SCU may cancel the C-MOVE service by issuing a C-MOVE-CANCEL request at any time during the processing of the C-MOVE. The SCU shall interpret a C-MOVE response with a status of Canceled to indicate the transfer was canceled. The C-MOVE response with a status of Canceled shall contain the number of Completed, Failed, and Warning C-STORE sub-operations. If present, the Remaining sub-operations count shall contain the number of C-STORE sub-operations which were not initiated due to the C-MOVE-CANCEL request.

[Hagay Lupesko]

Hi Zsolt,

I have encountered a similar problem to what you described...

Can you provide more details as to how you resolved the issue, and specifically how did you setup and sent the abort?

Thanks!

Hagay

[Zsolt Zimmermann]

Hi.

I did this inside my SCP class, AbortButtonClick is connected to a form button event in my SCP constructor.

public void SendMoveAbort(DicomAbortSource Source, DicomAbortReason Reason) 
  { if (Associated) { SendAbort(Source, Reason); 
                      Associated = false; 
                    } 
  } 

private void AbortButtonClick(object sender, EventArgs e) 
  { SendMoveAbort(DicomAbortSource.ServiceUser, DicomAbortReason.NotSpecified); 
  }