DICOM PS3.3 2020e - Information Object Definitions

C.8.26.2 Visual Field Static Perimetry Test Parameters Module

Table C.8.26.2-1 defines the Attributes used to represent the parameters used during a patient's visual field test.

Table C.8.26.2-1. Visual Field Static Perimetry Test Parameters Module Attributes

Attribute Name

Tag

Type

Attribute Description

Visual Field Horizontal Extent

(0024,0010)

1

The maximum horizontal angular subtend (diameter or width) of the tested visual field, in degrees.

Visual Field Vertical Extent

(0024,0011)

1

The maximum vertical angular subtend (diameter or height) of the tested visual field, in degrees.

Visual Field Shape

(0024,0012)

1

The shape of the visual field tested.

Defined Terms:

RECTANGLE

CIRCLE

ELLIPSE

Screening Test Mode Code Sequence

(0024,0016)

1C

Mode used to determine how the starting luminance values and expected thresholds are chosen.

Only a single Item shall be included in this Sequence.

Required if Content Item Modifier Sequence (0040,0441) within Performed Protocol Code Sequence (0040,0260) contains an Item with the value (360156006, SCT, "Screening"). May be present otherwise.

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

DCID 4252 “Visual Field Static Perimetry Screening Test Modes”

Maximum Stimulus Luminance

(0024,0018)

1

Maximum luminance of stimulus, in candelas per square meter (cd/m²).

Background Luminance

(0024,0020)

1

Background luminance of the device, in candelas per square meter (cd/m²).

Note

This value is easily convertible to apostilb, which is used only in perimetry and is not a standardized unit.

Stimulus Color Code Sequence

(0024,0021)

1

Color of light stimulus presented to the patient.

Only a single Item shall be included in this Sequence.

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

DCID 4255 “Visual Field Illumination Color”

Background Illumination Color Code Sequence

(0024,0024)

1

Color of the background illumination of the visual field device.

Only a single Item shall be included in this Sequence.

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

DCID 4255 “Visual Field Illumination Color”

Stimulus Area

(0024,0025)

1

Area of light stimulus presented to the patient, in degrees squared.

Stimulus Presentation Time

(0024,0028)

1

The duration of time that a light stimulus is presented to a patient per each individual test point, in milliseconds.

Note

This time is the same for each stimulus presentation.


DICOM PS3.3 2020e - Information Object Definitions