sirius-pacs is the server used by sirius-view on the client side.
sirius-pacs is responsible to serve studies as fast as posible to the html5 viewer.
sirius-pacs does not agregate new studies. This task is reserved to sirius-store.
sirius-pacs uses dicom representation eDCKV (DCKV with series+instance prefix). DCKV (DICOM Contextual Key Value) and eDCKV are described at length in https://github.com/jacquesfauquex/DCKV
sirius-pacs uses pixel compression j2k 4 quality layers on the storage side and j2h (high throughput protocol of jpeg 2000) to comunicate with sirius-view. This implies that sirius-pacs includes a transcoder j2k>j2h
Detailed documentation of sirius-pacs in this wiki and of sirius-view in this other wiki