the module uses protocols such as HL7, DICOM so it is not necessarily tied to dcm4chee.
I havent tried any PACS together with https://github.com/openmrs/openmrs-module-radiology but thats because I dont know any other open source PACS that has a DICOM modality worklist (MWL) which is what the radiology module relies on.
The technical features we need the PACS to have in order for the radiology module to work are:
- can receive HL7v2 ORM messages (specifically version 2.3.1 at the moment) to create orders in its DICOM MWL
- sends DICOM MPPS messages on updates of the orders in the DICOM MWL
You might be able to get http://www.orthanc-server.com/ to work, but I have never tried it. There is a DICOM MWL plugin see https://lists.debian.org/debian-med/2016/01/msg00069.html
It would be great if you would try it out and give us feedback since the module aims to be independent of the PACS implementation. I am sure there would be some changes needed for it to work, but we are definitely willing to make them.