DICOM PS3.3 2019a - 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 (R-42453, SRT, "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 2019a - Information Object Definitions