DICOM PS3.3 2019d - Information Object Definitions

C.8.17.3 Ophthalmic Photographic Parameters Module

This Module describes equipment used to create original images.

Table C.8.17.3-1. Ophthalmic Photographic Parameters Module Attributes

Attribute Name

Tag

Type

Attribute Description

Acquisition Device Type Code Sequence

(0022,0015)

1

Describes the type of acquisition device

Only a single Item shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4202 “Ophthalmic Photography Acquisition Device”.

Illumination Type Code Sequence

(0022,0016)

2

Coded value for illumination

Zero or one Item shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4203 “Ophthalmic Photography Illumination”.

Light Path Filter Type Stack Code Sequence

(0022,0017)

2

Filters used in the light source path

Zero or more Items shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4204 “Ophthalmic Filter”.

Light Path Filter Pass-Through Wavelength

(0022,0001)

3

Nominal pass-through wavelength of light path filter in nm

Light Path Filter Pass Band

(0022,0002)

3

Pass band of light path filter in nm. This Attribute has two Values. The first is the shorter and the second the longer wavelength relative to the peak. The values are for the - 3dB nominal (1/2 of peak) pass through intensity

One of the two Values may be zero length, in which case it is a cutoff filter.

Image Path Filter Type Stack Code Sequence

(0022,0018)

2

Describes stack of filters used in image path

Zero or more Items shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4204 “Ophthalmic Filter”.

Image Path Filter Pass-Through Wavelength

(0022,0003)

3

Nominal pass-through wavelength of image path filter in nm

Image Path Filter Pass Band

(0022,0004)

3

Pass band of image path filter in nm. This Attribute has two Values. The first is the shorter and the second the longer wavelength relative to the peak. The values are for the - 3dB nominal (1/2 of peak) pass through intensity

One of the two Values may be zero length, in which case it is a cutoff filter

Lenses Code Sequence

(0022,0019)

2

Lenses that were used during the image acquisition

Zero or more Items shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4205 “Ophthalmic Lens”.

Detector Type

(0018,7004)

2

Type of detector used for creating this image.

Defined Terms:

CCD

Charge Coupled Devices

CMOS

Complementary Metal Oxide Semiconductor

Channel Description Code Sequence

(0022,001A)

1C

Describes the light color used for each channel to generate the image. Required if this differs from the natural interpretation.

Note

Interpretation and representation of RGB images rely on the assumption that the red channel really contains the red wavelength range of illumination light, the blue channel the blue wavelength range, etc. Some modalities use the RGB Photometric Interpretation as a container representing 3 channels of any illumination wavelength.

Shall have the same number of Items as the Value of Samples per Pixel Used (0028,0003) if present, or otherwise the value of Samples per Pixel (0028,0002). The channels shall be described in the order in which the channels are encoded.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

BCID 4206 “Ophthalmic Channel Description”.

Camera Angle of View

(0022,001E)

3

The aperture angle of the camera, in degrees


DICOM PS3.3 2019d - Information Object Definitions