A.41 Ophthalmic Photography 8 Bit Image Information Object Definition

This Section defines an Information Object to be used with several types of ophthalmic photographic imaging devices including fundus cameras, slit lamp cameras, scanning laser devices, stereoscopic cameras, video equipment and digital photographic equipment, with 8 bit resolution per pixel in each image plane.

A.41.1 Ophthalmic Photography 8 Bit Image IOD Description

The Ophthalmic Photography 8 Bit Image IOD specifies a single-frame or a multi-frame image acquired on a digital photographic DICOM modality. This IOD can be used to encode single ophthalmic images and cine sequences.

A.41.2 Ophthalmic Photography 8 Bit 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 Photography 8-Bit Image IOD, with exception of the VOI LUT, and Modality LUT entities, which are not used. Table A.41-1 specifies the Modules of the Ophthalmic Photography 8 Bit Image IOD.

Note: The Curve Module was previously include in the list of Modules that shall not be present, but has been retired from DICOM. It is still not permitted to be present. See PS 3.3 2004.

A.41.3 Ophthalmic Photography 8 Bit Image IOD Modules

Table A.41-1OPHTHALMIC PHOTOGRAPHY 8 BIT 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
Ophthalmic Photography Series C.8.17.1 M
Clinical Trial Series C.7.3.2 U
Frame of Reference Synchronization C.7.4.2 M
Equipment General Equipment C.7.5.1 M
Image General Image C.7.6.1 M
Image Pixel C.7.6.3 M
Enhanced Contrast/Bolus C 7.6.4b C - Required if contrast was administered, see A.41.4.2
Cine C.7.6.5 C - Required if there is a sequential temporal relationship between all frames
Multi-frame C.7.6.6 M
Device C.7.6.12 U
Acquisition Context C.7.6.14 U
Ophthalmic Photography Image C.8.17.2 M
Ocular Region Imaged C.8.17.5 M
Ophthalmic Photography Acquisition Parameters C.8.17.4 M
Ophthalmic Photographic Parameters C.8.17.3 M
ICC Profile C.11.15 U
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

Note: The Specimen Identification Module was previously included in this IOD but has been retired. See PS 3.3-2008.

A.41.4 Ophthalmic Photography 8 Bit Image IOD Content Constraints

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

A.41.4.1 Bits Allocated, Bits Stored, and High Bit

For Ophthalmic Photography 8 bit images, the Enumerated Value of Bits Allocated (0028,0100) (Image Pixel Module, C.7.6.3) shall be 8; the Enumerated Value of Bits Stored (0028,0101) shall be 8; and the Enumerated Value of High Bit (0028,0102) shall be 7.

A.41.4.2 Contrast/Bolus Agent Sequence

For Contrast/Bolus Agent Sequence (0018,0012), the defined CID 4200 shall be used.