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DICOM PS3.3 2020a - Information Object Definitions​ Page 1171​

Table C.8.25.16-3. Keratometry Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Steep Keratometric Axis​

(0046,0074)​

1​

Steepest meridian as defined by the greatest power of​

Sequence​

 

 

curvature and shortest radius of curvature.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Radius of Curvature​

(0046,0075)​

1​

Theradiusofcurvatureoftheprincipalmeridiansofthecornea,​

 

 

 

measured in mm.​

>Keratometric Power​

(0046,0076)​

2​

The refractive power of the cornea at the principal meridians,​

 

 

 

measured in diopters.​

>Keratometric Axis​

(0046,0077)​

2​

The meridian where the keratometric radius of curvature or​

 

 

 

power is measured, in degrees.​

FlatKeratometricAxisSequence​

(0046,0080)​

1​

Flattest meridian as defined by the least power of curvature​

 

 

 

and longest radius of curvature.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Radius of Curvature​

(0046,0075)​

1​

Theradiusofcurvatureoftheprincipalmeridiansofthecornea,​

 

 

 

measured in mm.​

>Keratometric Power​

(0046,0076)​

2​

The refractive power of the cornea at the principal meridians,​

 

 

 

measured in diopters.​

>Keratometric Axis​

(0046,0077)​

2​

The meridian where the keratometric radius of curvature or​

 

 

 

power is measured, in degrees.​

KeratometryMeasurementType​

(0022,1096)​

2​

Descriptors relevant to keratometry data.​

Code Sequence​

 

 

Zero or one Item shall be included in this Sequence.​

 

 

 

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

 

DCID 4235 “Keratometry Descriptors”​

Keratometer Index​

(0022,1033)​

2​

Thetranslationfactorspecifictoeachkeratometerthatderives​

 

 

 

a number for power from the measured radius of curvature of​

 

 

 

the cornea.​

C.8.25.16.4 IOL Ophthalmic Axial Length Macro​

Table C.8.25.16-4 describes the Attributes for the IOL Ophthalmic Axial Length Macro.​

Table C.8.25.16-4. IOL Ophthalmic Axial Length Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Ophthalmic Axial Length​

(0022,1012)​

1​

Axial length value and source that was used in calculation​

Sequence​

 

 

of IOL power.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Ophthalmic Axial Length​

(0022,1019)​

1​

The axial length of a patient's eye, in mm, that was used in​

 

 

 

calculation of IOL power.​

>Ophthalmic Axial Length​

(0022,1250)​

1​

Method used to select the value recorded in Ophthalmic​

Selection Method Code​

 

 

Axial Length (0022,1019).​

Sequence​

 

 

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”​

>Source of Ophthalmic Axial​

(0022,1035)​

1​

SourceofthevalueofOphthalmicAxialLength(0022,1019).​

Length Code Sequence​

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

- Standard -​

Page 1172​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

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

 

DCID 4240 “Ophthalmic Measurement or Calculation Data​

 

 

 

Source”​

>Referenced SOP Sequence​

(0008,1199)​

1C​

SOP Instances that are relevant to the interpretation of this​

 

 

 

SOP Instance.​

 

 

 

One or more Items shall be included in this Sequence.​

 

 

 

See Section C.8.25.16.1.1 for further explanation.​

 

 

 

Required if Source of Ophthalmic Axial Length Code​

 

 

 

Sequence (0022,1035) contains an Item with the value​

 

 

 

(111782, DCM, "Axial Measurements SOP Instance").​

>>Include Table 10-11 “SOP Instance Reference Macro Attributes”​

 

>OphthalmicUltrasoundMethod​

(0022,1044)​

1C​

Method used for obtaining axial measurements of the eye.​

Code Sequence​

 

 

Required if Ophthalmic Axial Measurements Device Type​

 

 

 

 

 

 

(0022,1009) is ULTRASOUND.​

 

 

 

Only a single Item shall be included in this Sequence.​

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

 

DCID 4230 “Ophthalmic Ultrasound Axial Measurements​

 

 

 

Type”​

C.8.25.16.5 Calculated IOL Macro​

Table C.8.25.16-5 describes the Attributes for the Calculated IOL Macro.​

Table C.8.25.16-5. Calculated IOL Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

IOL Manufacturer​

(0022,1093)​

1​

Name of the manufacturer that produced the lens.​

Implant Name​

(0022,1095)​

1​

The (product) name of the lens.​

Type of Optical Correction​

(0022,1046)​

3​

Type of the optical correction achieved by the IOL.​

 

 

 

Enumerated Values:​

 

 

 

SPHERICAL​

 

 

 

TORIC​

Lens Constant Sequence​

(0022,1092)​

1​

Constantsusedincalculationofintraocularlenspower.These​

 

 

 

constants are a characteristic of the model of intraocular lens​

 

 

 

being considered for use in cataract surgery.​

 

 

 

One or more Items shall be included in this Sequence.​

>Concept Name Code​

(0040,A043)​

1​

Constant type used in calculation of intraocular lens power.​

Sequence​

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

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

DCID 4237 “Lens Constant Type”​

>Numeric Value​

(0040,A30A)​

1​

The value of the constant used.​

IOL Power Sequence​

(0022,1090)​

1​

Information needed to select the intraocular lens power for​

 

 

 

cataract surgery.​

One or more Items shall be included in this Sequence.​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1173​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>IOL Power​

(0022,1053)​

1​

The intraocular lens power, in diopters.​

 

 

 

 

IfTypeofOpticalCorrection(0022,1046)isTORIC,thisvalue​

 

 

 

representsthesphericalequivalentofthetoricintraocularlens​

 

 

 

power.​

 

>Toric IOL Power Sequence​

(0022,1047)​

1C​

The toric intraocular lens power.​

 

 

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

Required if Type of Optical Correction (0022,1046) is TORIC.​

>>IncludeTableC.8.25.16-7“CalculatedToricPowerMacroAttributes”​

 

>Predicted Refractive Error​

(0022,1054)​

1​

The predicted postoperative refractive error (i.e., amount of​

 

 

 

near or far sightedness), in diopters.​

 

>Predicted Toric Error​

(0022,1048)​

1C​

The predicted postoperative toric error.​

 

Sequence​

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

 

 

 

Required if Type of Optical Correction (0022,1046) is TORIC.​

>>IncludeTableC.8.25.16-7“CalculatedToricPowerMacroAttributes”​

 

>Implant Part Number​

(0022,1097)​

2​

The (product) identifier of the lens.​

 

>Pre-SelectedforImplantation​

(0022,1049)​

3​

Indicates whether the intraocular lens specified by this​

 

 

 

Sequence Item has been pre-selected for implantation or not.​

 

 

 

Enumerated Values:​

 

 

 

 

YES​

 

 

 

 

NO​

 

 

 

 

Only one Item in IOL Power Sequence (0022,1090) shall​

 

 

 

contain the value YES.​

 

IOL Power for Exact​

(0022,1121)​

2​

The IOL power that would be required to achieve exact​

Emmetropia​

 

 

emmetropia, or no need for glasses at distance after surgery,​

 

 

 

in diopters.​

 

 

 

 

IfTypeofOpticalCorrection(0022,1046)isTORIC,thisvalue​

 

 

 

representsthesphericalequivalentofthetoricintraocularlens​

 

 

 

power for exact emmetropia.​

 

Toric IOL Power for Exact​

(0022,104A)​

2C​

The toric IOL power that would be required to achieve exact​

Emmetropia Sequence​

 

 

emmetropia.​

 

 

 

 

Zero or one Item shall be included in this Sequence.​

 

 

 

Required if Type of Optical Correction (0022,1046) is TORIC.​

>Include Table C.8.25.16-7 “Calculated Toric Power Macro Attributes”​

 

IOL Power for Exact Target​

(0022,1122)​

2​

The IOL power that would be required to exactly achieve​

Refraction​

 

 

Target Refraction (0022,1037), in diopters.​

 

IfTypeofOpticalCorrection(0022,1046)isTORIC,thisvalue​ representsthesphericalequivalentofthetoricintraocularlens​ power for exact target refraction.​

- Standard -​

Page 1174​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Toric IOL Power for Exact​

(0022,104B)​

2C​

The toric IOL power that would be required to exactly achieve​

Target Refraction Sequence​

 

 

Target Refraction (0022,1037).​

 

 

 

Zero or one Item shall be included in this Sequence.​

 

 

 

Required if Type of Optical Correction (0022,1046) is TORIC.​

>Include Table C.8.25.16-7 “Calculated Toric Power Macro Attributes”​

Calculation Comment​

(0022,112A)​

3​

Comment, hints or warnings related to the intraocular lens​

Sequence​

 

 

calculation(s).​

 

 

 

One or more Items are permitted in this Sequence.​

 

 

 

See Section C.8.25.16.5.1.​

>Calculation Comment Type​

(0022,112B)​

1​

The type of the Calculation Comment (0022,112C).​

 

 

 

Defined Terms:​

 

 

 

INFORMATIVE​

 

 

 

WARNING​

>Calculation Comment​

(0022,112C)​

1​

Comment related to the intraocular lens calculation(s).​

C.8.25.16.5.1 Calculated IOL Macro Attributes Attributes​

C.8.25.16.5.1 Calculation Comment Sequence​

Specific behaviors associated with Calculation Comment Type (0022,112B) are left to implementations to define. For example, the​ user might be expected to be notified about a comment with a type of WARNING whereas they might have to seek out comments​ with a type of INFORMATIVE. However, since this is an optional Attribute, and one that was added to this Module after its original​ definition, and there are no SOP Class specific constraints on display behavior, the sender cannot be guaranteed that a receiving​ system or user will not ignore or discard the comments.​

C.8.25.16.6 Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro​

Table C.8.25.16-6 describes the Attributes for the Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro​

Table C.8.25.16-6. Ophthalmic Axial Measurements Quality Image SOP Instance Reference Macro​

Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Referenced SOP Class UID​

(0008,1150)​

1​ Uniquely identifies the referenced SOP Class.​

 

 

 

Enumerated Values:​

 

 

 

 

1.2.840.10008.5.1.4.1.1.7.2​

Multi-frame Grayscale Byte​

 

 

 

 

Secondary Capture Image Storage​

 

 

 

1.2.840.10008.5.1.4.1.1.7.4​

Multi-frame True Color Secondary​

 

 

 

 

Capture Image Storage​

Referenced SOP Instance​

(0008,1155)​

1​ Uniquely identifies the referenced SOP Instance.​

UID​

 

 

 

 

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1175​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Referenced Frame Number​

(0008,1160)​

1​

Identifies the frame number within the Referenced SOP Instance to​

 

 

 

which the reference applies. The first frame shall be denoted as frame​

 

 

 

number 1.​

 

Only a single value shall exist.​

Note​

This Attribute is a multi-value field but for this Macro it can​ only contain one value.​

C.8.25.16.7 Calculated Toric Power Macro​

Table C.8.25.16-7 specifies and describes the attributes that identify the toric amount of calculated refractive power used in IOL cal-​ culation.​

Table C.8.25.16-7. Calculated Toric Power Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Sphere Power​

(0046,0146)​

3​

The calculated spherical power, in diopters.​

Cylinder Power​

(0046,0147)​

1​

The calculated cylinder power, in diopters.​

Cylinder Axis​

(0022,0009)​

1​

The calculated cylinder axis, in degrees.​

C.8.25.16.8 Cornea Measurement Macro​

Table C.8.25.16-8 specifies and describes the attributes for the Cornea Measurement Macro used in IOL calculation.​

Table C.8.25.16-8. Cornea Measurement Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Steep Corneal Axis​

(0046,0112)​

1​ Steepest meridian as defined by the greatest power of curvature​

Sequence​

 

 

and shortest radius of curvature.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Radius of Curvature​

(0046,0075)​

1​ The radius of curvature of the principal meridians of the cornea,​

 

 

 

measured in mm.​

>Corneal Power​

(0046,0114)​

2​ The refractive power of the cornea at the principal meridians,​

 

 

 

measured in diopters.​

>Corneal Axis​

(0046,0115)​

2​ The meridian where the radius of curvature or corneal power is​

 

 

 

measured, in degrees.​

Flat Corneal Axis Sequence​

(0046,0113)​

1​ Flattest meridian as defined by the least power of curvature and​

 

 

 

longest radius of curvature.​

 

 

 

Only a single Item shall be included in this Sequence.​

>Radius of Curvature​

(0046,0075)​

1​ The radius of curvature of the principal meridians of the cornea,​

 

 

 

measured in mm.​

>Corneal Power​

(0046,0114)​

2​ The refractive power of the cornea at the principal meridians,​

 

 

 

measured in diopters.​

>Corneal Axis​

(0046,0115)​

2​ The meridian where the radius of curvature or corneal power is​

 

 

 

measured, in degrees.​

Cornea Measurement​

(0046,0116)​

1​ Method of the cornea measurement.​

Method Code Sequence​

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

- Standard -​

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