A.41 Ophthalmic Photography 8 Bit Image IOD
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## A.41 Ophthalmic Photography 8 Bit Image IOD

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 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 PS3.3-2004.

### A.41.3 Ophthalmic Photography 8 Bit Image IOD Modules

Table A.41-1. Ophthalmic 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 Section 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
Common Instance Reference | C.12.2 | U
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 PS3.3-2008.

### 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, Section 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 “Ophthalmic Imaging Agent” shall be used.

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