Auto routing and modification PatientID

General
1

Hello all,

I’m struggling with this case.
We need to modify the patient ID and send the data to other modalities.
Can someone help me with a Lua script?

This part works well:

function OnStoredInstance(instanceId, tags, metadata)
Delete(SendToModality(instanceId, ‘sample’))
end

But I don’t understand how to perform the modification by lua script.

2

Hello @andrii ,

This example demonstrates how to modify an instance before sending it to another modality.

Please read carefully the Modification of a Single Instance section of the Orthanc Book.The code will download the modified instance that will not be, after the /modify request, modified in Orthanc, then it will be transferred to the target-modality by sending the whole DICOM to /store-straight (straight here means “without storing it in Orthanc first”)

Normally, a new instance with a new instance ID is created, but the Force and SOPInstanceUID below will ensure it keeps the same ID.

Pasting the code here for future visitors who might have issues with the GitHub link:

unction OnStoredInstance(instanceId, tags, metadata, origin)
    -- Do not process twice the same file
    if origin['RequestOrigin'] ~= 'Lua' then
 
       local modifyRequest = {}
       
       modifyRequest["Remove"] = {}
       table.insert(modifyRequest["Remove"], "0028-3010")
       
       modifyRequest["Replace"] = {}
       modifyRequest["Replace"]["SOPInstanceUID"] = tags["SOPInstanceUID"]
       modifyRequest["Force"] = true  -- because we want to keep the same SOPInstanceUID
 
       -- download a modified version of the instance
       local modifiedDicom = RestApiPost('/instances/' .. instanceId .. '/modify', DumpJson(modifyRequest))
 
       RestApiPost('/modalities/target-modality/store-straight', modifiedDicom)

       RestApiDelete('/instances/' .. instanceId)
    end
 end

If you want to upload to the same Orthanc, you need to make sure that OverwriteInstances is set to true in your configuration file, and you need to adapt the RestApiPost URL and, of course, don’t do the RestApiDelete.

Hope this helps!

Benjamin