C-MOVE and C-FIND not always working

[ishaanve...@gmail.com]

I wanted to query images from PACS systems and store them in Orthanc, but always run into problems:

1. When making study-level query against a ClearCanvas PACS, the answer is always empty. When making series-level query against a ClearCanvas PACS, I can get answers correctly.

My query is:
{"Level":"Study","Query":{"AccessionNumber":"*","PatientBirthDate":"*","PatientID":"*","PatientName":"*","PatientSex":"*","StudyDate":"*","StudyDescription":"*"}}

The REST API returns a successful query result:
{
"ID": "43f318ae-9c24-49df-8ba1-b60a12a29311",
"Path": "/queries/43f318ae-9c24-49df-8ba1-b60a12a29311"
}

Unfortunately, when trying to access the studies through another REST API call (queries/43f318ae-9c24-49df-8ba1-b60a12a29311/answers), the result is always empty. Interestingly, when I change the query level from "Study" to "Series", I can get answers correctly.

As a note, when I make queries against Osirix, my study-level query is always successful. Is this a problem of Orthanc or ClearCanvas?

2. When making study-level query against DicomServer (http://www.dicomserver.co.uk/Index.html), I was always able to get answers back successfully, but when issuing c-move REST API calls, I was never able to retrieve any DICOM images. It should be noted that the Orthanc explorer did seem to try to download the images by showing a "Retrieving Images from DICOM Modalities" dialog, but I was never able to receive the images (I did make sure the firewall setting is correct on my computer).

I am wondering if anyone can share insights on how to fix those errors, and more importantly, to share ideas on how to diagnose those C-MOVE and C-FIND problems. I am planning to try C-FIND and C-MOVE against a Carestream Vue PACS. It would be great if someone can confirm whether Orthanc REST APIs can work against Carestream PACS or not.

Thanks!
Ishaan

[Alain Mazy]

Hi Ishaan,

Have you already configured your PACS Modality as 'ClearCanvas' ?

Othanc do modify C-Find requests/response according to the modality type.  Check the DicomModalities section of your configuration file:

// The list of the known DICOM modalities
  "DicomModalities" : {
    /**
     * A fourth parameter is available to enable patches for a
     * specific PACS manufacturer. The allowed values are currently
     * "Generic" (default value), "StoreScp" (storescp tool from
     * DCMTK), "ClearCanvas", "MedInria", "Dcm4Chee", "SyngoVia",
     * "AgfaImpax" (Agfa IMPAX), "EFilm2" (eFilm version 2), and
     * "Vitrea". This parameter is case-sensitive.
     **/
    // "clearcanvas" : [ "CLEARCANVAS", "192.168.1.1", 104, "ClearCanvas" ]
  },

--

Alain Mazy / CTO 
a...@osimis.io / +32 494 31 67 27

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