Negative search in Orthanc Explorer


In Orthanc explorer I can perform a search by specifying some data and wildcards if required. E.g. Search for all patients whose name includes John would require me to enter John in the patient name box. I have done various searches on the web but don’t seem to be able to find any information on how to find all patients whose name doesn’t include John.

Can anyone help with this please or point me to ward any documentation that might help?



Hi Steve,

Unfortunately, I don’t think there are such “advanced” search feature in DICOM C-Find (and Orthanc Explorer search uses basically the same algo as for C-Find).

Best regards,



DICOM does not specify “negative searches” in C-FIND, as can be seen in the standard:

As a consequence, Orthanc does not implement this feature.