DICOM Standard Browser

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PatientMModule - Patient
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Corneal Topography Map SeriesMModule - Series
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Corneal Topography Map ImageMModule - Image
Corneal Topography Map AnalysisMModule - Image
(0008,2112) Source Image Sequence1Sequence
(0008,1150) Referenced SOP Class UID1Unique Identifier
(0008,1155) Referenced SOP Instance UID1Unique Identifier
(0008,1160) Referenced Frame Number1CInteger String
(0040,A170) Purpose of Reference Code Sequence1Sequence
(0062,000B) Referenced Segment Number1CUnsigned Short
(0022,1415) Ophthalmic Mapping Device Type1Code String
(0046,0074) Steep Keratometric Axis Sequence1Sequence
(0046,0080) Flat Keratometric Axis Sequence1Sequence
(0046,0201) Corneal Topography Surface1Code String
(0046,0202) Corneal Vertex Location1Single
(0046,0203) Pupil Centroid X-Coordinate1CSingle
(0046,0204) Pupil Centroid Y-Coordinate1CSingle
(0046,0205) Equivalent Pupil Radius1CSingle
(0046,0207) Corneal Topography Map Type Code Sequence1Sequence
(0046,0208) Vertices of the Outline of Pupil1CInteger String
(0046,0210) Corneal Topography Mapping Normals Sequence1CSequence
(0046,0211) Maximum Corneal Curvature Sequence3Sequence
(0046,0215) Minimum Keratometric Sequence1Sequence
(0046,0218) Simulated Keratometric Cylinder Sequence1Sequence
(0046,0220) Average Corneal Power1Single
(0046,0224) Corneal I-S Value1Single
(0046,0227) Analyzed Area1Single
(0046,0230) Surface Regularity Index3Single
(0046,0232) Surface Asymmetry Index3Single
(0046,0234) Corneal Eccentricity Index3Single
(0046,0236) Keratoconus Prediction Index3Single
(0046,0238) Decimal Potential Visual Acuity3Single
(0046,0242) Corneal Topography Map Quality Evaluation1CCode String
(0046,0244) Source Image Corneal Processed Data Sequence1Sequence
Ophthalmic Photography Acquisition ParametersMModule - Image
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Data synced with official DICOM standard on 18 April 2024. The DICOM Standard is under continuous maintenance, and the current official version is available at http://www.dicomstandard.org/current/. DICOM Parts 3, 4, and 6, © NEMA. Please note that the most recent PDF version of the standard is the official reference, and should checked when making technical decisions.

Source Image Sequence Attribute

Tag(0008,2112)
TypeRequired (1)
KeywordSourceImageSequence
Value Multiplicity1
Value RepresentationSequence (SQ)

The Image SOP Class/Instance pair of the Image that was used to generate this corneal topography map.

Note

Attribute Corneal Vertex Location (0046,0202) in this corneal topography map has been generated by the source image and provides the registration of the Corneal Topography Map to the Source Image.

See Section C.8.30.3.1.2 for further explanation.

Only a single Item shall be included in this Sequence.

Section C.8.30.3.1.2

C.8.30.3.1.2 Source Image Sequence

Equipment generating a corneal topography map image first obtains a source image. This image may be single-frame or multi-frame such as when the Attribute Ophthalmic Mapping Device Type (0022,1415) is SLIT_BASED or INTERFEROMETRY. From this source image, the necessary measurement data is obtained to build the corneal topography map.

A typical source image may be generated by the Ophthalmic Photography 8 bit or 16 bit SOP Classes for device types of REFLECTION and SLIT_BASED. A typical source image for device type of INTERFEROMETRY would be Ophthalmic Tomography Image SOP Class.

Figure C.8.30.3.1-2 illustrates an example where the source image (left) is generated using a device type of REFLECTION. The corneal topography map and color scale is shown in the center (this is the output of this SOP Class). The right figure shows an example of the corneal topography map and color scale superimposed on the source image.

Figure C.8.30.3.1-2. Source Image (left), Corneal Topography Map Image (Center), Corneal Topography Map Presented as an Overlay on the Source Image (right)