DICOM PS3.1 2019d - Introduction and Overview

6.7 PS3.7: Message Exchange

PS3.7 of the DICOM Standard specifies both the service and protocol used by an application in a medical imaging environment to exchange Messages over the communications support services defined in PS3.8. A Message is composed of a Command Stream defined in PS3.7 followed by an optional Data Stream as defined in PS3.5.

PS3.7 specifies:

DICOM PS3.1 2019d - Introduction and Overview