This has been added

Background DICOM import is implemented (retrieval is not yet). This may become more important when we implement launching of Slicer from web browser.

It's true that if you use the query / retrieve in the dicom module it's not async, but if you run the listener and push from the scanner or pacs it is async, so this is definitely a backlog issue, if we leave it open.

Retrieve data using DICOMweb protocol is extremely slow, and this is how many people would like to use Slicer (click image in web browser and open it in desktop Slicer), so we must make this data retrieve asynchronous.

I was talking about DIMSE, since the original issue is from 2014 it probably refers to that.

Regarding DICOMweb, I agree it's slow. dicomweb-client uses a sync version of requests so it cannot overlap network operations. I looked into async python for requests, but it would need to be integrated with Qt. Another option would be to use Qt for event driven downloads instead python.

Probably we should start a new dicomweb issue and close this one.

OK.