C-STORE
C-STORE is the DICOM network service used to transfer a composite object — an image or similar instance — from one device to another, and it is the operation behind "sending a study" to a PACS.
What C-STORE means in practice
The sender opens an association, offers the SOP Classes and transfer syntaxes it wants to use, and on acceptance transmits each instance in turn, receiving a status back for every one. Because the receiver acknowledges each instance individually, a transfer that fails partway through can be identified per image rather than as one opaque failure.
Source
This definition follows NEMA PS3.7 §9.1.1 (C-STORE), service class in PS3.4 Annex B, published by NEMA as part of the DICOM standard.
Related terms
Storage SCP
A Storage SCP is the role a device plays when it accepts incoming DICOM images, listening for C-STORE requests and storing what it receives — the role a PACS or an archiving viewer performs.
Storage SCU
A Storage SCU is the role a device plays when it initiates a C-STORE request to send DICOM images to a Storage SCP — the role a CT or MR console performs when it pushes a finished study to a PACS.
C-ECHO (DICOM Verification)
C-ECHO is the DICOM network service that tests whether two devices can communicate, without transferring any image data — the equivalent of a ping at the DICOM layer.
Transfer Syntax
A transfer syntax is the set of encoding rules — byte ordering, explicit or implicit value representation, and any compression — that a DICOM object is written in, and it is negotiated between two devices before they exchange data.
Related on this site: Receiving studies over C-STORE.