3 Definitions

3 Definitions (Current)
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3.1 Reference Model Definitions

This Part makes use of the following terms defined in [ISO 7498-1]:

Application Entity (AE): See [ISO 7498-1].
Application Entity Title: See [ISO 7498-1].
Protocol Data Unit: See [ISO 7498-1].
Transfer Syntax: See [ISO 7498-1].

3.2 ACSE Service Definitions

This Part makes use of the following terms defined in [ISO 8649]:

Association: See [ISO 8649].
Association Initiator: See [ISO 8649].

3.3 Presentation Service Definitions

This Part makes use of the following terms defined in [ISO 8822]:

Abstract Syntax: See [ISO 8822].
Abstract Syntax Name: See [ISO 8822].
Presentation Context: See [ISO 8822].
Transfer Syntax Name: See [ISO 8822].

3.4 DICOM Introduction and Overview Definitions

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

Conformance Statement: See Conformance Statement in PS3.1 .
Information Object: See Information Object in PS3.1 .
Service-Object Pair Class (SOP Class): See Service-Object Pair Class in PS3.1 .

3.5 DICOM Information Object Definitions

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

Information Object Definition (IOD): See Information Object Definition in PS3.3 .

3.6 DICOM Service Class Specification Definitions

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

Real-World Activity: See Real-World Activity in PS3.4 .
Service Class: See Service Class in PS3.4 .
Service Class User (SCU): See Service Class User in PS3.4 .
Service Class Provider (SCP): See Service Class Provider in PS3.4 .
Meta Service-Object Pair Class (Meta SOP Class): See Meta Service-Object Pair Class in PS3.4 .

3.7 DICOM Data Structure and Encoding Definitions

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

Data Set: See Data Set in PS3.5 .
DICOM Transfer Syntax: See DICOM Transfer Syntax in PS3.5 .
Unique Identifier (UID): See Unique Identifier in PS3.5 .

3.8 DICOM Message Exchange Definitions

This Part makes use of the following terms defined in PS3.7:

Extended Negotiation: See Extended Negotiation in PS3.7 .
Implementation Class UID: See Implementation Class UID in PS3.7 .

3.9 DICOM Upper Layer Service Definitions

This Part makes use of the following terms defined in PS3.8:

DICOM Upper Layer Service: See DICOM Upper Layer Service in PS3.8 .
Presentation Address: See Presentation Address in PS3.8 .

3.10 Media Storage and File Format for Data Interchange

This Part makes use of the following terms defined in PS3.10:

File-set: See File-set in PS3.10 .
File-set Creator (FSC): See File-set Creator in PS3.10 .
File-set Reader (FSR): See File-set Reader in PS3.10 .
File-set Updater (FSU): See File-set Updater in PS3.10 .
Media Storage Application Profile: See Media Storage Application Profile in PS3.10 .

3.11 DICOM Conformance

This Part uses the following definitions:

Standard SOP Class

A SOP Class defined in the DICOM Standard that is used in an implementation with no modifications.

Standard Extended SOP Class

A SOP Class defined in the DICOM Standard extended in an implementation with additional Type 3 Attributes. The additional Attributes may either be drawn from the Data Dictionary in PS3.6, or may be Private Attributes. The semantics of the related Standard SOP Class shall not be modified by the additional Type 3 Attributes when absent. Therefore, the Standard Extended SOP Class utilizes the same UID as the related Standard SOP Class.

Note

IODs from a Standard Extended SOP Class may be freely exchanged between DICOM implementations since implementations that do not recognize the additional Type 3 Attributes would simply ignore them.

Specialized SOP Class

A SOP Class derived from a Standard SOP Class that has been specialized in an implementation by additional Type 1, 1C, 2, 2C, or 3 Attributes, by enumeration of specific permitted values for Attributes, or by enumeration of specific permitted Templates. The additional Attributes may either be drawn from the Data Dictionary in PS3.6, or may be Private Attributes. The enumeration of permitted Attribute values or Templates shall be a subset of those permitted in the related Standard SOP Class. Since the semantics of the related Standard SOP Class may be modified by the additional Attributes, a Specialized SOP Class utilizes a Privately Defined UID that differs from the UID for the related Standard SOP Class.

Note

Since a Specialized SOP Class has a different UID than a Standard or Standard Extended SOP Class, other DICOM implementations may not recognize the Specialized SOP Class. Because of this limitation, a Specialized SOP Class should only be used when a Standard or Standard Extended SOP Class would not be appropriate. Before different implementations can exchange Instances in a Specialized SOP Class, the implementations must agree on the UID, content (in particular the additional Type 1, 1C, 2, and 2C Attributes), and semantics of the Specialized SOP Class. A Specialized SOP Class may be used to create a new or experimental SOP Class that is closely related to a Standard SOP Class.
The Association Negotiation for a Specialized SOP Class may include a SOP Class Common Extended Negotiation Sub-Item (as defined in PS3.7) for identification of the Service Class and of the Related General SOP Class from which it was specialized. This may allow a receiving application, without prior agreement on the Specialized SOP Class IOD, to process Instances of that class as if they were instances of a Related General SOP Class.

Private SOP Class

A SOP Class that is not defined in the DICOM Standard, but is published in an implementation's Conformance Statement.

Note

Since a Private SOP Class is not defined in the DICOM Standard, other DICOM implementations may not recognize the Private SOP Class. Because of this limitation, a Private SOP Class should only be used when a Standard or Standard Extended SOP Class would not be appropriate. In order for different implementations to exchange Instances in a Private SOP Class, the implementations must agree on the UID, content (in particular the Type 1, 1C, 2, and 2C Attributes), and semantics of the Private SOP Class. A Private SOP Class may be used to create a totally new or experimental SOP Class.

Standard Attribute

An Attribute defined in the Data Dictionary in PS3.6.

Private Attribute

An Attribute that is not defined in the DICOM Standard.

Standard Application Profile

An Application Profile defined in the DICOM Standard that is used in an implementation with no modifications.

Augmented Application Profile

An Application Profile derived from a Standard Application Profile by incorporating support for additional Standard or Standard Extended SOP Classes.

Private Application Profile

An Application Profile that is not defined in the DICOM Standard, but is published in an implementation's Conformance Statement.

Security Profile

A mechanism for selecting an appropriate set of choices from the Parts of the DICOM Standard along with corresponding security mechanisms (e.g., encryption algorithms) for the support of security facilities.

Transformation of DICOM SR to CDA

A mechanism for mapping and transforming DICOM SR objects to HL7 CDA documents.

3.12 Hypertext Transfer Protocol (HTTP/HTTPS) Definitions

This Part makes use of the following terms defined in PS3.18:

HTTP: See HTTP in PS3.18 .
HTTPS: See HTTPS in PS3.18 .
origin server: See origin server in PS3.18 .
user agent: See user agent in PS3.18 .

3.13 Web Services Definitions

This Part makes use of the following terms defined in PS3.18

Bulk Data: See Bulk Data in PS3.18 .
Bulk Data URI: See Bulk Data URI in PS3.18 .
DICOM Object: See DICOM Object in PS3.18 .
DICOM Resource: See DICOM Resource in PS3.18 .
DIMSE Proxy: See DIMSE Proxy in PS3.18 .
Event Report: See Event Report in PS3.18 .
Metadata: See Metadata in PS3.18 .
RESTful Web Service: See RESTful Web Service in PS3.18 .
Service: See Service in PS3.18 .
sRGB: See sRGB in PS3.18 .
Status Report: See Status Report in PS3.18 .
Subscriber: See Subscriber in PS3.18 .
Target URI: See Target URI in PS3.18 .
Thumbnail: See Thumbnail in PS3.18 .
Transaction: See Transaction in PS3.18 .
UTF-8: See UTF-8 in PS3.18 .

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