Query/Retrieve SR?? - DICOM

This is a discussion on Query/Retrieve SR?? - DICOM ; Hi, When you retrieve an SR which referenced an Image for example. If you don't have this image on your disk, you have to make a query/retrieve on it?? Or transaction Query/Retrieve SR implements the "automatic" download of the referenced ...

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Thread: Query/Retrieve SR??

  1. Query/Retrieve SR??

    Hi,
    When you retrieve an SR which referenced an Image for example. If you
    don't have this image on your disk, you have to make a query/retrieve
    on it?? Or transaction Query/Retrieve SR implements the "automatic"
    download of the referenced images??




  2. Re: Query/Retrieve SR??

    The DICOM standard doesn't provide any "automatic" retrieval of the
    images referenced by an SR. The behavior and dependencies of your
    application is something you will have to decide yourself. You could
    for example build your application around a constraint which says you
    would only support visualization/display of SRs with images when your
    system had received both the SR and the images it refences. An
    alternative would be for your application to go search for images
    referenced by the SR and to retrieve them. Several different DICOM
    services could be used by your application to do that search/retrieval.
    DICOM query/retrieve is the most widely deployed service - available on
    many different PACS, workstations. However, the hierarchical nature of
    the default DICOM query model, makes it less than ideal for tracking
    down individual image instances, especially if the images could
    potentially be located in a number of different archives. DICOM Q/R
    also tends to require a large number of network interactions when it is
    being used to track down individual images. DICOM Relevant Patient
    Information Query is another service being developed to provide a
    lighter weight/faster query which could be used to track down
    referenced images. Finally, a DICOM instance locator service has been
    proposed in the DICOM committee to provide a means for applications to
    locate DICOM instances by their UIDs without having to use higher level
    patient or study level attributes to search for the images. This was
    just proposed in the committee in January so I wouldn't look to have it
    in the standard before the end of the year and probably not deployed in
    operational systems for another year or two after that


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