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DICOM PS3.3 2020a - Information Object Definitions​

Page 1081​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Segmented Property​

(0062,000F)​

1​

Sequence defining the specific property the segment represents.​

Type Code Sequence​

 

 

Note​

 

 

 

 

 

 

 

 

"Property" is used in the sense of meaning "what the​

 

 

 

segmented voxels represent", whether it be a physical or​

 

 

 

biologicalobject,berealorconceptual,havingspatial,temporal​

 

 

 

or functional extent or not. I.e., it is what the segment "is" (as​

 

 

 

opposed to some feature, attribute, quality, or characteristic​

 

 

 

of it, like color or shape or size).​

 

 

 

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

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

BCID 7151 “Segmentation Property Types”.​

>Segmented Property​

(0062,0011)​

3​

Sequence defining the modifier of the property type of this segment.​

Type Modifier Code​

 

 

One or more Items are permitted in this Sequence.​

Sequence​

 

 

>>Include Table 8.8-1 “Code Sequence Macro Attributes”​ DCID 244 “Laterality”.​

 

 

 

Note​

 

 

 

For Retinal Segmentation Surfaces, laterality is not typically​

 

 

 

specified.​

Tracking ID​

(0062,0020)​

1C​

A text label used for tracking a finding or feature, potentially across​

 

 

 

multiple reporting objects, over time. This label shall be unique within​

 

 

 

the domain in which it is used.​

 

 

 

Required if Tracking UID (0062,0021) is present.​

 

 

 

Note​

 

 

 

1.​May or may not have the same value as Segment Label​

 

 

 

(0062,0005).​

 

 

 

2.​Related SR instances may exist, for example, to record​

 

 

 

measurementsrelatedtothissegment,butneednotexist​

 

 

 

for this Attribute to be used.​

 

 

 

3.​This Attribute will have the same value as the value of the​

 

 

 

(112039, DCM, "Tracking Identifier") Content Item in SR​

 

 

 

instancesthatreferencethisSegmentinthisSegmentation​

 

 

 

Instance.​

Tracking UID​

(0062,0021)​

1C​

A unique identifier used for tracking a finding or feature, potentially​

across multiple reporting objects, over time.​ Required if Tracking ID (0062,0020) is present.​

Note​

1.​Related SR instances may exist, for example, to record​ measurementsrelatedtothissegment,butneednotexist​ for this Attribute to be used.​

2.​This Attribute will have the same value as the value of the​ (112040,DCM,"TrackingUniqueIdentifier")ContentItem​ in SR instances that reference this Segment in this​ Segmentation Instance.​

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Page 1082​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Definition Source​

(0008,1156)​

3​

Instances containing the source of the Segment information.​

Sequence​

 

 

Only a single Item is permitted in this Sequence.​

 

 

 

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

 

Attributes”.​

 

 

 

>Referenced ROI​

(3006,0084)​

1C​

The value of ROI Number (3006,0022) in the referenced SOP Instance​

Number​

 

 

that identifies the ROI that is the origin of the Segment information.​

Required if Referenced SOP Class UID (0008,1150) is RT Structure​

Set Storage ("1.2.840.10008.5.1.4.1.1.481.3").​

C.8.21 X-Ray 3D​

C.8.21.1 X-Ray 3D Image Module​

This section describes the X-Ray 3D Image Module. Table C.8.21.1-1 contains IOD Attributes that describe a X-Ray 3D Image by​ specializing Attributes of the General Image Module and Image Pixel Module, and adding additional Attributes.​

Table C.8.21.1-1. X-Ray 3D Image Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Image Type​

(0008,0008)​

1​

Image identification characteristics.​

 

 

 

See Section C.8.21.1.1.1 for specialization.​

IncludeTableC.8-131“CommonCT/MRImageDescriptionMacro​

Attributes”​

 

 

 

Bits Allocated​

(0028,0100)​

1​

Number of bits allocated for each voxel sample. Each sample shall​

 

 

 

have the same number of bits allocated.​

 

 

 

Enumerated Values:​

 

 

 

8​

 

 

 

16​

Bits Stored​

(0028,0101)​

1​

Number of bits stored for each voxel sample. Each sample shall​

 

 

 

have the same number of bits stored.​

 

 

 

Enumerated Values:​

 

 

 

8​

 

 

 

9​

 

 

 

10​

 

 

 

11​

 

 

 

12​

 

 

 

13​

 

 

 

14​

 

 

 

15​

 

 

 

16​

High Bit​

(0028,0102)​

1​

Most significant bit for pixel sample data. Each sample shall have​

 

 

 

the same high bit. Shall be one less than the value in Bits Stored​

 

 

 

(0028,0101).​

Samples per Pixel​

(0028,0002)​

1​

Number of samples (color planes) in this image shall have a value​

 

 

 

of 1.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1083​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Photometric Interpretation​

(0028,0004)​

1​

Specifies the intended interpretation of the voxel data.​

 

 

 

Enumerated Values:​

 

 

 

 

MONOCHROME2​

 

Content Qualification​

(0018,9004)​

1​

Content Qualification Indicator​

 

 

 

 

Enumerated Values:​

 

 

 

 

PRODUCT​

 

 

 

 

RESEARCH​

 

 

 

 

SERVICE​

 

 

 

 

See Section C.8.13.2.1.1 for further explanation.​

 

Burned In Annotation​

(0028,0301)​

1​

Indicates whether or not the image contains sufficient burned in​

 

 

 

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

 

 

 

Enumerated Values:​

 

 

 

 

NO​

 

Recognizable Visual​

(0028,0302)​

3​

Indicateswhetherornottheimagecontainssufficientlyrecognizable​

Features​

 

 

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

 

 

 

images to identify the patient.​

 

 

 

 

Enumerated Values:​

 

 

 

 

YES​

 

 

 

 

NO​

 

 

 

 

If this Attribute is absent, then the image may or may not contain​

 

 

 

recognizable visual features.​

 

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​

Ratio​

 

 

been 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​

Alabelforthelossycompressionmethod(s)thathavebeenapplied​

Method​

 

 

to this image.​

 

See Section C.7.6.1.1.5.1.​

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

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Page 1084​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

ReferencedImageEvidence​

(0008,9092)​

1C​

Full set of Composite SOP Instances referred to inside the​

Sequence​

 

 

Referenced Image Sequences of this SOP Instance. See​

 

 

 

Section C.8.13.2.1.2 for further explanation.​

 

 

 

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

 

 

 

RequirediftheReferencedImageSequence(0008,1140)ispresent.​

>Include Table C.17-3 “Hierarchical SOP Instance Reference​

 

Macro Attributes”​

 

 

 

Image Comments​

(0020,4000)​

3​

User-defined comments about the image.​

Quality Control Image​

(0028,0300)​

3​

Indicates whether or not this image is a quality control or phantom​

 

 

 

image.​

 

 

 

Enumerated Values:​

 

 

 

YES​

 

 

 

NO​

 

 

 

IfthisAttributeisabsent,thentheimagemayormaynotbeaquality​

 

 

 

control or phantom image.​

Icon Image Sequence​

(0088,0200)​

3​

This icon image is representative of the Image.​

 

 

 

Only a single Item is permitted in this Sequence.​

>Include Table C.7-11b “Image Pixel Macro Attributes”​

See Section C.7.6.1.1.6 for further explanation.​

Presentation LUT Shape​

(2050,0020)​

1​

Specifies a predefined identity transformation for the Presentation​

 

 

 

LUT such that the output of all grayscale transformations, if any,​

 

 

 

are defined to be in P-Values.​

 

 

 

Enumerated Values:​

 

 

 

IDENTITY​ output is in P-Values​

Source Irradiation Event​

(0008,3011)​

3​

The set of Irradiation Events that were produced in this acquisition​

Sequence​

 

 

context.​

 

 

 

See C.8.21.1.1.4.​

 

 

 

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

>Irradiation Event UID​

(0008,3010)​

1​

Unique identification of the irradiation event(s) associated with the​

 

 

 

acquisition of this image.​

C.8.21.1.1 X-Ray 3D Image Module Attribute Description​

C.8.21.1.1.1 Image Type and Frame Type​

In addition to the requirements specified in Section C.8.16.1 Image Type, the following additional requirements and Defined Terms​ are specified.​

C.8.21.1.1.1.1 Pixel Data Characteristics​

Value 1 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.1. No additional requirements or​ Defined Terms.​

C.8.21.1.1.1.2 Patient Examination Characteristics​

Value 2 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.2. No additional requirements or​ Defined Terms.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1085​

C.8.21.1.1.1.3 Image Flavor​

Value 3 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.3. No additional requirements or​ Defined Terms.​

C.8.21.1.1.1.4 Derived Pixel Contrast​

Value 4 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in Section C.8.16.1.4. The value shall be NONE.​

C.8.21.1.1.2 Volumetric Properties Attribute​

The value of Volumetric Properties (0008,9206) is discussed in Section C.8.16.2.1.2.​

Note​

1.​ForregularlysampledtomosynthesisslicesreconstructedfromprojectionX-Raydata,avalueofVOLUMEorSAMPLED​ is appropriate.​

2.​For slabs constructed by averaging adjacent regularly sampled tomosynthesis slices to produce thicker slices, a value​ of SAMPLED is appropriate.​

3.​For mathematically generated 2D views (e.g., constructed as Maximum Intensity Projections) of regularly sampled tom-​ osynthesis slices, a value of SAMPLED is appropriate.​

C.8.21.1.1.3 Volume Based Calculation Technique Attribute​

The value of Volume Based Calculation Technique (0008,9207) is discussed in Section C.8.16.2.1.3.​

Table C.8.21.1.1.3-1 specifies the additional Defined Terms for the Volume Based Calculation Technique (0008,9207) Attribute to​ those in Table C.8-134 in Section C.8.16.2.1.3.​

Table C.8.21.1.1.3-1. Additional Volume Based Calculation Technique Attribute Values for X-Ray 3D​

Defined Term Name​

Defined Term Description​

TOMOSYNTHESIS​

Construction of tomographic slices or slabs from limited angle projection data.​

Note​

 

1.​FortomosynthesisslicesorslabsreconstructedfromprojectionX-Raydata,avalueofTOMOSYNTHESISisappropriate.​

2.​For mathematically generated 2D views constructed as Maximum Intensity Projections of tomosynthesis slices, a value​ of MAX_IP is appropriate.​

C.8.21.1.1.4 Source Irradiation Event Sequence​

The Source Irradiation Event Sequence (0008,3011) contains the Irradiation Event UIDs of all the original projection images that were​ used in the 3D reconstruction process of this X-Ray 3D Image, regardless whether the projection images are encoded as DICOM​ images or not. Therefore, it allows relating the reconstructed X-Ray 3D image to its contributing irradiation events contained in the​ Radiation Dose SR.​

The equipment generating the projection images associates these images to one or more Irradiation Event UIDs. All these UIDs are​ then included in the Radiation Dose SR as well as in the appropriate projection DICOM images. An X-Ray 3D image reconstructed​ from a set of projection images will include those Irradiation Event UIDs of the images that participated to that 3D reconstruction. In​ case the projection images are not encoded as DICOM images, the X-Ray equipment is responsible for including the contributing Ir-​ radiation Event UIDs in any further X-Ray 3D image reconstructed on that equipment.​

An X-Ray 3D image derived from one or more X-Ray 3D images will include in the derived image all the Irradiation Event UIDs of the​ source images.​

C.8.21.2 X-Ray 3D Contributing Image Sources Modules​

This section describes the X-Ray 3D Image Contributing Sources Modules.​

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