DICOM PS3.18 2024b - Web Services

8.10.5 Send Event Report Transaction

The origin server uses this transaction to notify a user agent of Events.

This transaction sends a notification, containing an Event Report, over an established Notification Connection from an origin server to a user agent. Unlike most transactions, this transaction is initiated by the origin server.

This transaction corresponds to a DIMSE N-EVENT-REPORT action.

Each service may define Events, and the corresponding Event Report messages and their contents, related to its resources. Request

The request shall use the WebSocket Data Frame transmission protocol. Request Payload

The data frames shall have an opcode of "%x1" (text).

The data frame payload data shall be a DICOM JSON Dataset containing the Attributes of the Event Report.


  1. The WebSocket protocol does not currently allow content negotiation so it is not possible to support both XML and JSON encoding of Event Report messages.

  2. If the Event Reports are being proxied into DIMSE N-EVENT Reports, a Message ID (0000,0110) must be managed by the proxy.

DICOM PS3.18 2024b - Web Services