A.52 Ophthalmic Tomography Image Information Object Definition

This Section defines an Information Object to be used with optical ophthalmic tomographic imaging devices, including optical coherence scanners and confocal scanning laser ophthalmoscopes, but excluding ophthalmic ultrasound devices.

A.52.1 Ophthalmic Tomography Image IOD Description

The Ophthalmic Tomography Image IOD specifies a single-frame or a multi-frame image acquired on an Ophthalmic Tomography modality. This IOD can be used to encode both single and multi-frame ophthalmic images.

A.52.2 Ophthalmic Tomography Image IOD Entity-Relationship Model

The E-R Model in Section A.1.2 of this Part depicts those components of the DICOM Information Model that directly reference the Ophthalmic Tomography Image IOD. Table A.52.3-1 specifies the Modules of the Ophthalmic Tomography Image IOD.

A.52.3 Ophthalmic Tomography Image IOD Modules

Table A.52.3-1OPHTHALMIC TOMOGRAPHY IMAGE IOD MODULES

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
Ophthalmic Tomography Series C.8.17.6 M
Frame of Reference Frame of Reference C.7.4.1 C - Required if Ophthalmic Photography Reference Image available
Synchronization C.7.4.2 C - Required if Ophthalmic Photography Reference Image available
Equipment General Equipment C.7.5.1 M
Enhanced General Equipment C.7.5.2 M
Image Image Pixel C.7.6.3 M
Enhanced Contrast/Bolus C 7.6.4b C - Required if contrast was administered
Multi-frame Functional Groups C.7.6.16 M
Multi-frame Dimension C.7.6.17 M
Acquisition Context C.7.6.14 M
Cardiac Synchronization C.7.6.18.1 C - Required if cardiac synchronization was used
Ophthalmic Tomography Image C.8.17.7 M
Ophthalmic Tomography Acquisition Parameters C.8.17.8 M
Ophthalmic Tomography Parameters C.8.17.9 M
Ocular Region Imaged C.8.17.5 M
SOP Common C.12.1 M
Frame Extraction C.12.3 C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

A.52.4 Ophthalmic Tomography Image IOD Content Constraints

The following constraints on Image attributes take precedence over the descriptions given in the Module Attribute Tables.

A.52.4.1 Contrast/Bolus Agent Sequence

For Contrast/Bolus Agent Sequence (0018,0012), the Defined Context Group is 4200.

A.52.4.2 Overlay Plane Module and VOI LUT Module

The Overlay Plane Module and VOI LUT Module shall not be used in a Standard Extended SOP Class of the Ophthalmic Tomography Image.

Note: In order to annotate images, whether during acquisition or subsequently, SOP Instances of the Grayscale Softcopy Presentation State Storage or the Structured Report Storage SOP Classes that reference the image SOP Instance may be used.

Pseudo-color presentation information may be applied through the use of separate Pseudo-color Softcopy Presentation State SOP instances.

No standard mechanism is provided for inclusion of annotations within the image SOP Instance itself and implementers are discouraged from using private extensions to circumvent this restriction.

A.52.4.3 Ophthalmic Tomography Image Functional Group Macros

Table A.52.4.3-1 specifies the use of the Functional Group macros used in the Multi-frame Functional Group Module for the Ophthalmic Tomography Image IOD.

Table A.52.4.3-1OPHTHALMIC TOMOGRAPHY FUNCTIONAL GROUP MACROS

Function Group Macro Section Usage
Pixel Measures C.7.6.16.2.1 M
Frame Content C.7.6.16.2.2 M - May not be used as a Shared Functional Group.
Plane Position (Patient) C.7.6.16.2.3 C - Required if no Ophthalmic Photography Reference Image available; May be present otherwise
Plane Orientation (Patient) C.7.6.16.2.4 C - Required if no Ophthalmic Photography Reference Image available; May be present otherwise
Referenced Image C.7.6.16.2.5 C - Required if Ophthalmic Photography Reference Image available.
Derivation Image C.7.6.16.2.6 C - Required if the image or frame has been derived from another SOP Instance.
Frame Anatomy C.7.6.16.2.8 M
Cardiac Synchronization C.7.6.16.2.7 C - Required if Cardiac Synchronization Technique (0018,9037) equals other than NONE May be present otherwise.
Contrast/Bolus Usage C.7.6.16.2.12 C - Required if Contrast/Bolus Agent Sequence (0018,0012) is used. May not be used as a Shared Functional Group
Ophthalmic Frame Location C.8.17.10.1 U