DICOM PS3.6 2024b - Data Dictionary

5 Conventions

Word(s) are capitalized in this document to help the reader understand that these word(s) have been previously defined in Section 3 and are to be interpreted with that meaning.

A Data Element Tag is represented as (gggg,eeee), where gggg equates to the Group Number and eeee equates to the Element Number within that Group. Data Element Tags are represented in hexadecimal notation as specified for each named Data Element in this Standard.

Where an "x" is shown in a group or element number, e.g. (ggxx,eeee), "x" means any value from 0 through F inclusive. The resulting group number is still required to be even, as defined by PS3.5, since these are Standard Data Element Tags.

"RET" is used to indicate that the corresponding Data Element, SOP Class, or Transfer Syntax has been retired. Retired items are shown italicized. For retired items, the edition of the Standard in parentheses is the edition in which the item last appeared before it was retired. When the name of a retired Data Element has been reused, the retired element has the qualifier "(Retired)" added, or "(Trial)" in the cases in which the Data Element was used in a Draft For Trial Implementation but not standardized.


The use of retired items is supported in this version of DICOM. However, new implementations are strongly encouraged to implement alternative Data Elements, SOP Classes or Transfer Syntaxes.

"Note n" is used to indicate that further information is provided at the end of the corresponding table. The "n" is the consecutive number of the note. This information is not inserted directly into the tables in order to preserve their simple structure, e.g., for automatic processing of the contents.

DICOM PS3.6 2024b - Data Dictionary