DICOM PS3.3 2019c - Information Object Definitions

C.17.3.2 Content Item Attributes

Each Content Item contains:

C.17.3.2.1 Content Item Value Type

The value of the name/value pair is encoded with one of the Value Types defined in Table C.17.3-7 (the choice of which may be constrained by the IOD in which this Module is contained). Value Type (0040,A040) explicitly conveys the type of Content Item value encoding.

Table C.17.3-7. Value Type Definitions

Value Type

Concept Name

Concept Value

Description

TEXT

Type of text, e.g., "Findings", or name of identifier, e.g., "Lesion ID"

Textual expression of the concept

Free text, narrative description of unlimited length. May also be used to provide a label or identifier value.

NUM

Type of numeric value or measurement, e.g., "BPD"

Numeric value and associated Unit of Measurement

Numeric value fully qualified by coded representation of the measurement name and unit of measurement.

CODE

Type of code, e.g., "Findings"

Coded expression of the concept

Categorical coded value. Representation of nominal or non-numeric ordinal values.

DATETIME

Type of DateTime, e.g., "Date/Time of onset"

Concatenated date and time

Date and time of occurrence of the type of event denoted by the Concept Name.

DATE

Type of Date, e.g., "Birth Date"

Calendar date

Date of occurrence of the type of event denoted by the Concept Name.

TIME

Type of Time, e.g "Start Time"

Time of day

Time of occurrence of the type of event denoted by the Concept Name.

UIDREF

Type of UID, e.g "Study Instance UID"

Unique Identifier

Unique Identifier (UID) of the entity identified by the Concept Name.

PNAME

Role of person, e.g., "Recording Observer"

Name of person

Person name of the person whose role is described by the Concept Name.

COMPOSITE

Purpose of Reference

Reference to UIDs of Composite SOP Instances

A reference to one Composite SOP Instance that is not an Image or Waveform.

IMAGE

Purpose of Reference

Reference to UIDs of Image Composite SOP Instances

A reference to one Image. IMAGE Content Item may convey a reference to a Softcopy Presentation State associated with the Image.

WAVEFORM

Purpose of Reference

Reference to UIDs of Waveform Composite SOP Instances

A reference to one Waveform.

SCOORD

Purpose of Reference

Listing of spatial coordinates

Spatial coordinates of a geometric region of interest in the DICOM image coordinate system. The IMAGE Content Item from which spatial coordinates are selected is denoted by a SELECTED FROM relationship.

SCOORD3D

Purpose of reference

Listing of spatial 3D coordinates

3D spatial coordinates (x,y,z) of a geometric region of interest in a Reference Coordinate System.

TCOORD

Purpose of Reference

Listing of temporal coordinates

Temporal Coordinates (i.e., time or event-based coordinates) of a region of interest in the DICOM waveform coordinate system. The WAVEFORM or IMAGE or SCOORD Content Item from which Temporal Coordinates are selected is denoted by a SELECTED FROM relationship.

CONTAINER

Document Title or document section heading. Concept Name conveys the Document Title (if the CONTAINER is the Document Root Content Item) or the category of observation.

The content of the CONTAINER. The value of a CONTAINER Content Item is the collection of Content Items that it contains.

CONTAINER groups Content Items and defines the heading or category of observation that applies to that content. The heading describes the content of the CONTAINER Content Item and may map to a document section heading in a printed or displayed document.


Note

It is recommended that drawings and sketches, sometimes used in reports, be represented by IMAGE Content Items that reference separate SOP Instances (e.g., 8-bit, MONOCHROME2, Secondary Capture, or Multi-frame Single Bit Secondary Capture).

DICOM PS3.3 2019c - Information Object Definitions