DICOM PS3.3 2020e - Information Object Definitions
C.8.25.14.4 Ophthalmic Axial Measurements Selected Macro

Table C.8.25.14-5 describes the Attributes for the Ophthalmic Axial Measurements Selected Macro. These are the Attributes of the Ophthalmic Axial Length (0022,1019) selected for use in IOL calculations.

Table C.8.25.14-5. Ophthalmic Axial Measurements Selected Macro Attributes

Attribute Name

Tag

Type

Attribute Description

Ultrasound Selected Ophthalmic Axial Length Sequence

(0022,1230)

1C

Information related to the selected axial length measurement of the patient's eye when acquired on an ultrasound device.

Only a single Item shall be included in this Sequence.

Required if Ophthalmic Axial Measurements Device Type (0022,1009) is ULTRASOUND.

>Ophthalmic Axial Length Measurements Type

(0022,1010)

3

Identifies whether measuring the total axial length of the patient's eye or a segment of the eye for which a discrete measurement was obtained.

Enumerated Values:

TOTAL LENGTH

the total axial length was taken with one measurement

LENGTH SUMMATION

the total axial length is a summation of segmental lengths

>Ophthalmic Axial Length

(0022,1019)

1

The axial length measurement, in mm.

The type of measurement is specified in the Ophthalmic Axial Length Measurements Type (0022,1010).

See Section C.8.25.14.1.1.4 for further explanation.

>Ophthalmic Axial Length Selection Method Code Sequence

(0022,1250)

1

Method used to derive the value recorded in Ophthalmic Axial Length (0022,1019).

Only a single Item shall be included in this Sequence.

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

DCID 4241 “Ophthalmic Axial Length Selection Method”.

>Referenced Ophthalmic Axial Length Measurement QC Image Sequence

(0022,1330)

1

References to the quality control image associated with this measurement.

Only a single Item shall be included in this Sequence.

See Section C.8.25.14.1.1.6 for further explanation.

>>Include Table C.8.25.16-6 “Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro Attributes”

>Ophthalmic Axial Length Quality Metric Sequence

(0022,1262)

1

Information about the quality metric applied to Ophthalmic Axial Length (0022,1019).

Only a single Item shall be included in this Sequence.

>>Include Table C.8.25.14-6 “Ophthalmic Axial Length Quality Metric Macro Attributes”

>Selected Segmental Ophthalmic Axial Length Sequence

(0022,1257)

1C

Segmental axial length measurements of a patient's eye that are summed to derive a total axial length for the eye.

One or more Items shall be included in this Sequence.

Required if the value of Ophthalmic Axial Length Measurements Type (0022,1010) is present and is LENGTH SUMMATION. May be present otherwise.

>>Ophthalmic Axial Length

(0022,1019)

1

The axial length measurement, in mm.

The type of measurement is specified in the Ophthalmic Axial Length Measurements Type (0022,1010).

See Section C.8.25.14.1.1.3 and Section C.8.25.14.1.1.4 for further explanation.

>>Ophthalmic Axial Length Measurements Segment Name Code Sequence

(0022,1101)

1

Name of the segment measured. See Section C.8.25.14.1.1.4 for further explanation.

Only a single Item shall be included in this Sequence.

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

DCID 4233 “Ophthalmic Axial Length Measurements Segment Names”

Optical Selected Ophthalmic Axial Length Sequence

(0022,1255)

1C

Information related to the selected axial length measurement(s) of the patient's eye when acquired on an optical device.

One or more Items shall be included in this Sequence.

Required if Ophthalmic Axial Measurements Device Type (0022,1009) is OPTICAL.

>Ophthalmic Axial Length Measurements Type

(0022,1010)

3

Identifies whether measuring the total axial length of the patient's eye or a segment of the eye for which a discrete measurement was obtained.

Enumerated Values:

TOTAL LENGTH

the total axial length was taken with one measurement

LENGTH SUMMATION

the total axial length is a summation of segmental lengths

SEGMENTAL LENGTH

the length of a segment of the axis

>Selected Total Ophthalmic Axial Length Sequence

(0022,1260)

1C

Total axial length measurement selected for the patient's eye.

Only a single Item shall be included in this Sequence.

Required if the value of Ophthalmic Axial Length Measurements Type (0022,1010) is present and is either TOTAL LENGTH or LENGTH SUMMATION. May be present otherwise

Note

In case of Ophthalmic Axial Length Measurements Type (0022,1010) has the value LENGTH SUMMATION both the Selected Total Ophthalmic Axial Length Sequence (0022,1260) and Selected Segmental Ophthalmic Axial Length Sequence (0022,1257) are used.

>>Ophthalmic Axial Length

(0022,1019)

1

The axial length measurement, in mm.

The type of measurement is specified in the Ophthalmic Axial Length Measurements Type (0022,1010).

See Section C.8.25.14.1.1.3 and Section C.8.25.14.1.1.4 for further explanation.

>>Referenced Ophthalmic Axial Length Measurement QC Image Sequence

(0022,1330)

1

Reference to the quality control image associated with this measurement.

Only a single Item shall be included in this Sequence.

See Section C.8.25.14.1.1.6 for further explanation.

>>>Include Table C.8.25.16-6 “Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro Attributes”

>>Ophthalmic Axial Length Quality Metric Sequence

(0022,1262)

1

Information about the quality metric applied to Ophthalmic Axial Length (0022,1019).

Only a single Item shall be included in this Sequence.

>>>Include Table C.8.25.14-6 “Ophthalmic Axial Length Quality Metric Macro Attributes”

>Selected Segmental Ophthalmic Axial Length Sequence

(0022,1257)

1C

Segmental axial length measurement(s) selected for the patient's eye.

One or more Items shall be included in this Sequence.

Required if the value of Ophthalmic Axial Length Measurements Type (0022,1010) is present and is either SEGMENTAL LENGTH or LENGTH SUMMATION. May be present otherwise.

Note

In case of Ophthalmic Axial Length Measurements Type (0022,1010) has the value LENGTH SUMMATION both the Selected Total Ophthalmic Axial Length Sequence (0022,1260) and Selected Segmental Ophthalmic Axial Length Sequence (0022,1257) are used.

>>Ophthalmic Axial Length Measurements Segment Name Code Sequence

(0022,1101)

1

Name of the segment measured. See Section C.8.25.14.1.1.4 for further explanation.

Only a single Item shall be included in this Sequence.

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

DCID 4233 “Ophthalmic Axial Length Measurements Segment Names”

>>Ophthalmic Axial Length

(0022,1019)

1

The axial length measurement, in mm.

The type of measurement is specified in the Ophthalmic Axial Length Measurements Type (0022,1010).

See Section C.8.25.14.1.1.3 and Section C.8.25.14.1.1.4 for further explanation.

>>Referenced Ophthalmic Axial Length Measurement QC Image Sequence

(0022,1330)

3

Reference to the quality control image associated with this measurement.

Only a single Item is permitted in this Sequence.

See Section C.8.25.14.1.1.6 for further explanation.

>>>Include Table C.8.25.16-6 “Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro Attributes”

>>Ophthalmic Axial Length Quality Metric Sequence

(0022,1262)

3

Information about the quality metric applied to Ophthalmic Axial Length (0022,1019).

Only a single Item is permitted in this Sequence.

>>>Include Table C.8.25.14-6 “Ophthalmic Axial Length Quality Metric Macro Attributes”


DICOM PS3.3 2020e - Information Object Definitions