3 Definitions

3.1 Codes and Controlled Terminology Definitions

The following definitions are commonly used in this Part of the DICOM Standard:

Baseline Context Group Identifier (BCID)

Identifier that specifies the suggested Context Group for a Code Sequence Attribute.

See Table 5.6-1 “Conventions for Specification of Context Groups” in PS3.3 .

Baseline Template Identifier (BTID)

Identifier that specifies a Template suggested to be used in the creation of a set of Content Items.

Coding Scheme

Dictionary (lexicons) of concepts (terms) with assigned codes and well defined meanings.

Note

Examples of Coding Schemes include SNOMED and LOINC.

Context Group

A set of coded concepts defined by a Mapping Resource forming a set appropriate to use in a particular context.

Context Group Version

Version of a Context Group.

Context ID (CID)

Identifier of a Context Group.

Defined Context Group Identifier (DCID)

Identifier that specifies the Context Group for a Code Sequence Attribute that shall be used.

See Table 5.6-1 “Conventions for Specification of Context Groups” in PS3.3 .

Defined Template Identifier (DTID)

Identifier that specifies a Template that shall be used in the creation of a set of Content Items.

DICOM Content Mapping Resource (DCMR)

A Mapping Resource that defines Templates and Context Groups for use in DICOM IODs.

Extensible Context Group

Context Group that may be extended by a particular application by inclusion of additional concepts.

See Table 5.6-1 “Conventions for Specification of Context Groups” in PS3.3 .

Extensible Template

A Template that may be extended by a particular application by inclusion of additional Content Items beyond those specified in the Template.

Mapping Resource

A resource that defines context-dependent usage constraints (i.e., Value Set or Relationship Type restrictions) for Attributes. A resource that specifies the mapping of the content of an external controlled terminology to the components of a message standard.

Non-Extensible Context Group

Context Group whose defined set of concepts shall not be extended by an application.

See Table 5.6-1 “Conventions for Specification of Context Groups” in PS3.3 .

Non-Extensible Template

A Template that specifies the exact set of Content Items and corresponding Value Sets that shall be used and that shall not be extended by an application.

Relationship Type

The association between two Concepts. Examples: "HAS PROPERTIES", "CONTAINS", "INFERRED FROM".

Root Template

A Template whose first Content Item is a CONTAINER Content Item intended to be encoded in the top level Data Set of a SOP Instance. I.e., the root node of the Content Tree.

Template

A pattern that describes the Content Items, Value Types, Relationship Types and Value Sets that may be used in part of a Structured Report Content Tree, or in other Content Item constructs, such as Acquisition Context or Protocol Context. Analogous to a Module of an Information Object Definition.

Template ID (TID)

Identifier of a Template.

Value Set

The allowed values of a Code Sequence Attribute in a given context. Specified either as one or more individual values or by reference to a Context Group.

3.2 Information Object Definitions

This Part of the Standard makes use of the following terms defined in PS3.3:

Code Sequence Attribute

See Code Sequence Attribute in PS3.3 .

3.3 Contrast Administration Definitions

Imaging Agent

A substance administered to improve the imaging of specific organs, tissues, diseases and physiological functions. Adapted from Wikipedia http://en.wikipedia.org/wiki/Imaging_agent.

Note

1. Imaging agents include iodinated X-Ray and gadolinium-based MR contrast agents.

2. Saline flush is not an imaging agent but may be administered in conjunction with imaging agents.

3. Air used as a negative contrast agent is an imaging agent.

3.4 DICOM Introduction and Overview Definitions

This Part of the Standard makes use of the following terms defined in PS3.1:

Service-Object Pair Class (SOP Class)

See Service-Object Pair Class in PS3.1 .

3.5 DICOM Service Class Definitions

This Part of the Standard makes use of the following terms defined in PS3.4:

Service-Object Pair Instance (SOP Instance)

See Service-Object Pair Instance in PS3.4 .

3.6 DICOM Data Structures and Encoding

This Part of the Standard makes use of the following terms defined in PS3.5:

Data Set

See Data Set in PS3.5 .

3.7 Radiotherapy

Monitor Units (MU)

A unit of radiation output used to quantify a Meterset. See Section C.36.1.1.3 “Meterset” in PS3.3 .

3.8 Structured Report Definitions

This Part of the Standard makes use of the following terms defined in PS3.3:

Content Item

See Content Item in PS3.3 .

Content Tree

See Content Tree in PS3.3 .