How to find out where a DICOM instance originates from?

Information about the origin of the instances is stored as Metadata, which can be accessed using the REST API:

$ curl http://localhost:8042/instances/19816330-cb02e1cf-df3a8fe8-bf510623-ccefe9f5/metadata
[
"IndexInSeries",
"ReceptionDate",
"RemoteAET",
"Origin",
"TransferSyntax",
"SopClassUid",
"RemoteIP",
"CalledAET"
]

The relevant metadata about the origin of an instance is:

• Origin: Whether the instance was received from the REST API, the DICOM protocol, some plugin or some Lua script.

• RemoteAET: The remote AET (for DICOM).

• RemoteIP (in Orthanc ≥ 1.4.0): The IP address of the remote server (for REST API and DICOM).

• CalledAET (in Orthanc ≥ 1.4.0): The called AET (for DICOM).

• HttpUsername (in Orthanc ≥ 1.4.0): The username that created the instance (for REST API).

Please note that adding ?expand to the REST endpoint will result in expanding the actual Metadata values:

$ curl http://localhost:8042/instances/cab76369-429ce4d8-6ed415e7-7a3c9482-50f3b1b4/metadata?expand
{
"CalledAET" : "ORTHANCTMP1",
"IndexInSeries" : "1",
"Origin" : "DicomProtocol",
"ReceptionDate" : "20190225T143257",
"RemoteAET" : "ORTHANC",
"RemoteIP" : "127.0.0.1",
"SopClassUid" : "1.2.840.10008.5.1.4.1.1.1",
"TransferSyntax" : "1.2.840.10008.1.2"
}