Материал: part03

DICOM PS3.3 2020a - Information Object Definitions​

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Attribute Name​

Tag​

Type​

Attribute Description​

Bits Allocated​

(0028,0100)​

1​

Number of bits allocated for each pixel sample. See​

Section C.8.17.14.1.6 for specialization.​

Bits Stored​

(0028,0101)​

1​

Numberofbitsstoredforeachpixelsample.SeeSectionC.8.17.14.1.6​

for specialization.​

High Bit​

(0028,0102)​

1​

Most significant bit for pixel sample data.Shall be one less than the​

value in Bits Stored (0028,0101). See Section C.8.17.14.1.6 for​

specialization.​

Samples per Pixel​

(0028,0002)​

1​

Number of samples (planes) in this image.​

Enumerated Values:​

1​

Photometric Interpretation​

(0028,0004)​

1​

Specifies the intended interpretation of the pixel data.​

See Section C.8.17.14.1.4 for specialization.​

Pixel Representation​

(0028,0103)​

1​

Data representation of pixel samples.​

Enumerated Values:​

0​

Pixel Spacing​

(0028,0030)​

1​

Nominal physical distance at the focal plane (in the retina) between​

the center of each pixel, specified by a numeric pair - adjacent row​

spacing (delimiter) adjacent column spacing in mm. See Section​

10.7.1.3for further explanation of the value order.​

Note​

Sinceapatient'sretinaiscurvedandtheimagerepresentation​

is planar, there can be an error in using Pixel Spacing​

(0028,0030)formeasurementsintheperipheryoftheimage.​

En face imaging does not support wide field measurements.​

Content Time​

(0008,0033)​

1​

The time the image pixel data creation started.​

Content Date​

(0008,0023)​

1​

The date the image pixel data creation started.​

Source Image Sequence​

(0008,2112)​

1​

A Sequence that identifies the Images that were used to derive this​

Image.​

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

See Section C.12.4.1.2 and Section C.8.17.14.1.1 for further​

explanation.​

>Include Table 10-3 “Image SOP Instance Reference Macro​

Attributes”​

>Purpose of Reference​

(0040,A170)​

1​

Describes the purpose for which the reference is made, that is what​

Code Sequence​

rolethesourceimageorframe(s)playedinthederivationofthisimage.​

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

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

DCID 7202 “Source Image Purposes of Reference”.​

If the derived en face image is based upon OPT structure information,​

theConceptCodeshallbe(128250,DCM,"Structuralimageforimage​

processing").​

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Attribute Name​

Tag​

Type​

Attribute Description​

Derivation Algorithm​

(0022,1612)​

1​

Software algorithm that performed the derivation.​

Sequence​

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

>Include Table 10-19 “Algorithm Identification Macro​

DCID 4270 “OCT-A Processing Algorithm Families” shall be used for​

Attributes”​

Algorithm Family Code Sequence (0066,002F)​

Ophthalmic Image Type​

(0022,1615)​

1​

En face image type used to identify this SOP Instance​

Code Sequence​

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

See Section C.8.17.14.1.3 for further explanation.​

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

DCID 4271 “En Face Image Types”​

Ophthalmic Image Type​

(0022,1616)​

3​

Description of the en face image type.​

Description​

Window Center​

(0028,1050)​

1​

Window Center for display.​

See Section C.11.2.1.2 for further explanation.​

Note​

When Bits Allocated (0028,0100) is 8, the value is typically​

always set to 127 or 128.​

Window Width​

(0028,1051)​

1​

Window Width for display. See Section C.11.2.1.2 for further​

explanation.​

Note​

When Bits Allocated (0028,0100) is 8, the value is typically​

always set to 256.​

Ophthalmic FOV​

(0022,1517)​

3​

The horizontal field of view used to capture the ophthalmic image, in​

degrees. The field of view is the maximum image size displayed on​

the image plane, expressed as the angle subtended at the exit pupil​

of the eye by the maximum dimension 2r (where r equals the radius).​

Referenced Surface Mesh​

(0022,1620)​

1​

Reference to the surface mesh(s) used in the creation of this SOP​

Identification Sequence​

Instance.​

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

See Section C.8.17.14.1.2 for further explanation.​

>ReferencedSOPInstance​

(0008,1155)​

1​

Referenced SOP Instance that contains the surface segmentation​

UID​

used in the creation of this SOP Instance.​

>Referenced Surface​

(0066,002C)​

1​

Reference to a Surface Number (0066,0003) present in Surface​

Number​

Sequence (0066,0002).​

>SegmentedPropertyType​

(0062,000F)​

1​

Sequence defining the specific property the surface represents.​

Code Sequence​

Only a single Item is permitted in this Sequence​

DICOM PS3.3 2020a - Information Object Definitions​

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Attribute Name​

Tag​

Type​

Attribute Description​

>Surface Mesh Z-Pixel​

(0022,1658)​

1​

Offset in number of pixels along the z axis by which the mesh data​

Offset​

has been shifted when generating this SOP Instance.​

The mesh data is the Attribute Point Coordinates Data (0066,0016) of​

the surface mesh referenced by Attribute Referenced SOP Instance​

UID (0008,1155).​

Note​

If no offset is used the value is set to 0.​

Ophthalmic Axial Length​

(0022,1019)​

3​

The axial length measurement, in mm.​

Ophthalmic Axial Length​

(0022,1515)​

3​

The method used to obtain the Ophthalmic Axial Length.​

Method​

Enumerated values:​

MEASURED​ Measured axial length.​

ESTIMATED​ An estimated value based upon performing the​

examination (i.e., based upon surrogate markers of​

axial length).​

POPULATION​A length that represents a population norm (i.e., not​

based upon a measured axial length or surrogate​

markers of axial length).​

Lossy Image Compression​

(0028,2110)​

1​

Specifies whether an Image has undergone lossy compression (at a​

point in its lifetime).​

Enumerated Values:​

00​Image has NOT been subjected to lossy compression.​

01​Image has been subjected to lossy compression.​

Once this value has been set to 01 it shall not be reset.​

See Section C.7.6.1.1.5.​

Lossy Image Compression​

(0028,2112)​

1C​

Describes the approximate lossy compression ratio(s) that have been​

Ratio​

applied to this image.​

See Section C.7.6.1.1.5.2.​

Required if Lossy Image Compression (0028,2110) is "01".​

Lossy Image Compression​

(0028,2114)​

1C​

A label for the lossy compression method(s) that have been applied​

Method​

to this image.​

See Section C.7.6.1.1.5.1.​

Required if Lossy Image Compression (0028,2110) is "01".​

Presentation LUT Shape​

(2050,0020)​

1C​

Specifies an identity transformation for the Presentation LUT, such​

that the output of all grayscale transformations defined in the IOD​

containing this Module are defined to be P-Values.​

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DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Calibration Image​

(0050,0004)​

3​

Indicateswhetherareferenceobject(phantom)ofknownsizeispresent​

in the image and was used for calibration.​

Enumerated Values:​

YES​

NO​

Burned In Annotation​

(0028,0301)​

1​

Indicateswhetherornotimagecontainssufficientburnedinannotation​

to identify the patient and date the image was acquired.​

Enumerated Values:​

YES​

NO​

Recognizable Visual​

(0028,0302)​

1​

Indicates whether or not the image contains sufficiently recognizable​

Features​

visual features to allow the image or a reconstruction from a set of​

images to identify the patient.​

DICOM PS3.3 2020a - Information Object Definitions​

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