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

5.2.4 Cardinality

Each element/attribute has a cardinality indicator that specifies the number of allowable occurrences within a template instance. The cardinality indicators are interpreted with the following format "m…n" where m represents the least and n the most:

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