One potential path is using the DIMSE code from version one, found and packaged nicely here: https://github.com/OHIF/dicom-dimse

You could use it as part of a standalone Node app, then provide some simple Express routes for DICOMWeb-style calls. Creating a node proxy between DICOMweb to make DIMSE calls.

Not all PACS support DICOMWeb. Having a way to connect to and interact with them may be essential to some teams.