A.32 Visible Light Image Information Object Definitions
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## A.32 Visible Light Image Information Object Definitions

The Visible Light (VL) Image Information Object Definition (IOD) specifies images that are acquired by means of a camera or other sensors that are sensitive to visible or near-visible light.

Examples of types of equipment that create Visible Light Images include:

1. Rigid and flexible endoscopy equipment

2. Operation microscopes / colposcopes

3. Ophthalmology equipment

4. Digital or Video Cameras

5. Analysis microscopes

Separate IODs have been defined for specialized applications. Some support only single-frame images, some support both single-frame and multi-frame video images.

### A.32.1 VL Endoscopic Image IOD

#### A.32.1.1 VL Endoscopic Image IOD Description

The VL Endoscopic Image IOD specifies the Attributes of Single-frame VL Endoscopic Images.

#### A.32.1.2 VL Endoscopic 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 VL Endoscopic Image IOD, with exception of the VOI LUT, Frame of Reference and Modality LUT entities, which are not used. Additionally, Image in Figure A.1-1 represents a single-frame image. A frame denotes a two-dimensional organization of pixels recorded as a single exposure. Table A.32.1-1 specifies the Modules of the VL Endoscopic Image IOD.

### Note

1. An endoscopic procedure might include multiple series of single-frame endoscopic images as well as one or more additional series of related diagnostic images. The procedure might involve multiple Performed Procedure Steps, multiple endoscopes, and multiple anatomic regions and might be supervised, performed, and/or interpreted by one or more individuals.

2. Several distinct diagnostic or therapeutic processes might occur during an endoscopic procedure. For example: Endoscopic examination of duodenal mucosa, biopsy, lavage, or biliary stone removal.

3. The Curve entity was previously include in the list of entities that are not used, but has been retired from DICOM. It is still not used in this IOD. See PS3.3-2004.

Table A.32.1-1. VL Endoscopic 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
Equipment | General Equipment | C.7.5.1 | M
Image | General Image | C.7.6.1 | M
Image Pixel | C.7.6.3 | M
Acquisition Context | C.7.6.14 | M
Device | C.7.6.12 | U
Specimen | C.7.6.22 | U
VL Image | C.8.12.1 | M
Overlay Plane | C.9.2 | U
ICC Profile | C.11.15 | U
SOP Common | C.12.1 | M
Common Instance Reference | C.12.2 | U

#### A.32.1.3 VL Endoscopic Image IOD Content Constraints

##### A.32.1.3.1 Modality

The value of Modality (0008,0060) shall be ES.

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