DICOM PS3.20 2019d - Imaging Reports using HL7 Clinical Document Architecture

9.8.11.5 entry/procedure/text/reference

The procedure entry SHALL include a text/reference element, whose value attribute SHALL begin with a '#' and SHALL point to its corresponding narrative content block. See Section 9.1.1.1.

DICOM PS3.20 2019d - Imaging Reports using HL7 Clinical Document Architecture