Материал: part03

IncludeTableC.8.17.8-2“OphthalmicAcquisitionParametersMacroAttributes”​

C.8.17.5 Ocular Region Imaged Module​

TableC.8.17.5-1containsIODAttributesthatdescribetheanatomyimagedinanOphthalmicPhotographyorOphthalmicTomography​

Image Storage SOP Instance.​

Table C.8.17.5-1. Ocular Region Imaged Module Attributes​

Required if Ophthalmic Volumetric Properties Flag (0022,1622) is set to YES and​ Attributes Ophthalmic Anatomic Reference Point X-Coordinate (0022,1624) and​ Ophthalmic Anatomic Reference Point Y-Coordinate (0022,1626) do not contain a​ value. May be present otherwise.​

Note​

This Attribute is used to provide the user with a general reference point​ when viewing the image. If the implementation is able to identify a precise​ anatomic location, it will convey that information in Attributes Ophthalmic​ Anatomic Reference Point X-Coordinate (0022,1624) and Ophthalmic​ Anatomic Reference Point Y-Coordinate (0022,1626).​

>Include Table 8.8-1 “Code Sequence Macro​ BCID 4207 “Ophthalmic Image Position”.​ Attributes”​

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Image relative position specified with sub-pixel resolution such that the origin at the​

Top Left Hand Corner (TLHC) of the TLHC pixel is 0.0\0.0, the Bottom Right Hand​

Corner (BRHC) of the TLHC pixel is 1.0\1.0, and the BRHC of the BRHC pixel is​

Columns\Rows (see Figure C.10.5-1). The value must be within the range 0\0 to​

Rows.​

Required if Ophthalmic Volumetric Properties Flag (0022,1622) is set to YES. May​ be present otherwise.​

IncludeTable10-5“GeneralAnatomyMandatory​DCID4209“OphthalmicAnatomicStructureImaged”forAnatomicRegionSequence.​

Macro Attributes”​

DCID4266“OphthalmicAnatomicStructureReferencePoint”forPrimaryAnatomic​

Structure Sequence.​

In this Module, Primary Anatomic Structure Sequence (0008,2228) is specialized​ to be Type 1C; required if Attributes Ophthalmic Anatomic Reference Point​ X-Coordinate(0022,0024)andOphthalmicAnatomicReferencePointY-Coordinate​ (0022,0026) contain a value; may be present otherwise.​

C.8.17.5.1 Ocular Region Imaged Module Attribute Descriptions​

C.8.17.5.1.1 Ophthalmic Anatomic Reference Point Location​

The Attributes Ophthalmic Anatomic Reference Point X-Coordinate (0022,1624) and Ophthalmic Anatomic Reference Point Y-Co-​ ordinate(0022,1626)areusedwhenanOphthalmicTomographyImageStorageSOPInstancecontainsAttributestoconveyvolumetric​ properties (such as when using the Ophthalmic Tomography image for angiography). These Attributes identify the location of the​ anatomicregionconveyedinAttributePrimaryAnatomicRegionSequence(0008,2228).Themostcommonanatomicregionsidentified​ for an OCT angiography are the fovea centralis and optic nerve head.​

Note​

The Anatomic Region Sequence (0008,2218) is typically set to (81745001, SCT, "Eye").​

Figure C.8.17.5-1 shows an Ophthalmic Tomography image displaying the fovea centralis. The image Row/Column is defined as 245​ x 245 and the location of the fovea centralis is horizontal row = 194 and vertical row = 132. Therefore, Attribute Ophthalmic Anatomic​ Reference Point X-Coordinate (0022,0024) is equal to 194 and Attribute Ophthalmic Anatomic Reference Point Y-Coordinate​ (0022,0026) is equal to 132.​

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Figure C.8.17.5-1. En face Image - Ophthalmic Anatomic Reference Point Location Example​

C.8.17.6 Ophthalmic Tomography Series Module​

Table C.8.17.6-1 specifies the Attributes that identify and describe general information about the Ophthalmic Tomography Series.​

Table C.8.17.6-1. Ophthalmic Tomography Series Module Attributes​

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

Required if a Performed Procedure Step SOP Class was​ involved in the creation of this Series.​

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

C.8.17.7 Ophthalmic Tomography Image Module​

Table C.8.17.7-1 specifies the Attributes that describe an Image produced by Ophthalmic Tomography imaging modalities.​

Table C.8.17.7-1. Ophthalmic Tomography Image Module Attributes​

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Enumerated Values:​

8​

12​

16​

High Bit​ (0028,0102)​ 1​ Most significant bit for pixel sample data. Each sample shall have the​ same high bit.​

High Bit (0028,0102) shall be one less than Bits Stored​

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