DICOM PS3.18 2021e - Web Services
10.4.3.3.3 Rendered Resource Payload

The payload for a Rendered Resource (see Section 10.4.1.1.3) shall contain a rendering of all valid Instances of the Composite SOP classes for which conformance is claimed, e.g., origin server shall be able to render all Photometric Interpretations that are defined in the IOD for that SOP class. The content type of the response payload shall be a Rendered Media Type.

DICOM PS3.18 2021e - Web Services