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DICOM PS3.3 2020a - Information Object Definitions​

Page 1251​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>>Recommended Display​

(0066,0103)​

1C​

Default triplet values in which it is recommended that the point​

CIELab Value List​

 

 

shall be rendered. The units are specified in PCS-Values and the​

 

 

 

value is encoded as CIELab.​

 

 

 

 

See Section C.10.7.1.1.​

 

 

 

 

The number of triplets shall match the number of points stored in​

 

 

 

PointCoordinatesData(0066,0016),andbeencodedinthesame​

 

 

 

order so as to correspond.​

 

 

 

 

Required if Recommended Display CIELab Value (0062, 000D)​

 

 

 

is not present in this Sequence Item nor in the containing Track​

 

 

 

Set Sequence (0066,0101) Item.​

 

>>Recommended Display​

(0062,000D)​

1C​

Defaulttripletvalueinwhichitisrecommendedthatthetrackshall​

CIELab Value​

 

 

be rendered. The units are specified in PCS-Values and the value​

 

 

 

is encoded as CIELab.​

 

 

 

 

See Section C.10.7.1.1.​

 

 

 

 

RequiredifRecommendedDisplayCIELabValueList(0066,0103)​

 

 

 

is not present in this Sequence Item and Recommended Display​

 

 

 

CIELab Value (0062, 000D) is not present in the containing Track​

 

 

 

Set Sequence (0066,0101) Item.​

 

>Recommended Display​

(0062,000D)​

1C​

Default triplet value in which it is recommended that the track set​

CIELab Value​

 

 

berendered.TheunitsarespecifiedinPCS-Values,andthevalue​

 

 

 

is encoded as CIELab.​

 

 

 

 

See Section C.10.7.1.1.​

 

 

 

 

Required if neither Recommended Display CIELab Value (0062,​

 

 

 

000D)norRecommendedDisplayCIELabValueList(0066,0103)​

 

 

 

are present in every Item of the Track Sequence (0066,0102).​

>Recommended Line​

(0066,0038)​

3​

Specifies the thickness of each track in the track set with which it​

Thickness​

 

 

is recommended to be rendered.​

 

 

 

 

The units shall be the same as the units of the coordinate system​

 

 

 

in which the point coordinates are specified.​

 

>Measurements Sequence​

(0066,0121)​

3​

Measurements for some or all points along the tracks. Each Item​

 

 

 

describes one type of measurement.​

 

 

 

 

See Section C.8.33.2.1 for more details.​

 

 

 

 

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

>>Concept Name Code​

(0040,A043)​

1​

Defines the type of measurement stored in this Item.​

Sequence​

 

 

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

 

 

 

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

DCID 7263 “Diffusion Tractography Measurement Types”​

>>MeasurementUnitsCode​

(0040,08EA)​

1​

Units of measurement for the value in this Item.​

 

Sequence​

 

 

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

 

 

 

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

DCID 82 “Units of Measurement”.​

 

>>Measurement Values​

(0066,0132)​

1​

The measurement values for each track.​

 

Sequence​

 

 

The number and order of Items shall equal the Items in Track​

 

 

 

 

 

 

Sequence (0066,0102).​

 

- Standard -​

Page 1252​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>>>Floating Point Values​

(0066,0125)​

1​

Measurement values for points stored inPoint Coordinates Data​

 

 

 

(0066, 0016) of the corresponding track in Track Sequence​

 

 

 

(0066,0102).​

 

 

 

If Track Point Index List (0066,0129) is absent, measurement​

 

 

 

values are stored for every point in Point Coordinates Data​

 

 

 

(0066,0016)andthenumberofvaluesshallmatchthenumberand​

 

 

 

order of points stored in Point Coordinates Data (0066, 0016).​

 

 

 

If Track Point Index List (0066,0129) is present, measurement​

 

 

 

values are stored for a subset of points in Point Coordinates Data​

 

 

 

(0066, 0016) and the number of values shall match the number​

 

 

 

and order of point indices in Track Point Index List (0066,0129).​

 

 

 

See Section C.8.33.2.1.​

>>>Track Point Index List​

(0066,0129)​

1C​

List of indices referencing points stored in Point Coordinates Data​

 

 

 

(0066,0016)withinthecorrespondingtrackforwhichmeasurement​

 

 

 

values shall be stored.​

 

 

 

Required if Measurement Values stored in Floating Point Values​

 

 

 

(0066,0125) shall be associated to only a subset of points in Point​

 

 

 

Coordinates Data (0066,0016).​

 

 

 

See Section C.8.33.2.1.​

>Track Statistics Sequence​

(0066,0130)​

3​

One statistic for one data value per track in the Track Sequence​

 

 

 

(0066,0102).​

 

 

 

See Section C.8.33.2.1 for more details.​

 

 

 

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

>>Concept Name Code​

(0040,A043)​

1​

The value (quantity) for which the statistic is a summary.​

Sequence​

 

 

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

 

 

 

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

DCID 7263 “Diffusion Tractography Measurement Types”​

>>Modifier Code Sequence​

(0040,A195)​

1​

Specified the statistic and modifies the Concept Name Code​

 

 

 

Sequence (0040,A0143) of this Sequence Item.​

 

 

 

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

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

DCID 7464 “General Region of Interest Measurement Modifiers”​

>>MeasurementUnitsCode​

(0040,08EA)​

1​

Units of measurement for the statistic.​

Sequence​

 

 

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

 

 

 

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

DCID 82 “Units of Measurement”.​

>>Floating Point Values​

(0066,0125)​

1​

A value per track in the Track Sequence (0066,0102).​

 

 

 

The number and order of values shall equal the Items in the Track​

 

 

 

Sequence (0066,0102).​

>Track Set Statistics​

(0066,0124)​

3​

Statistics derived from the values for this Track Set.​

Sequence​

 

 

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

 

 

 

>>Include Table C.8.33-3 “Table Summary Statistics Macro​ Attributes”​

Defined CID for Concept Name Code Sequence (0040,A043) is​ CID 7263 “Diffusion Tractography Measurement Types”​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1253​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>Diffusion Acquisition Code​

(0066,0133)​

3​

Thediffusionacquisition(includingpost-processing)usedtoderive​

Sequence​

 

 

this track set.​

 

 

 

 

See Section C.8.33.2.2 for more details.​

 

 

 

 

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

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

DCID 7260 “Diffusion Acquisition Value Types”​

 

>Diffusion Model Code​

(0066,0134)​

1​

The diffusion model used to derive this track set.​

 

Sequence​

 

 

See Section C.8.33.2.2 for more details.​

 

 

 

 

 

 

 

 

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

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

DCID 7261 “Diffusion Model Value Types”​

 

>Tracking Algorithm​

(0066,0104)​

1​

The tractography algorithms used to derive this track set.​

Identification Sequence​

 

 

See Section C.8.33.2.2 for more details.​

 

 

 

 

 

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

>>Include Table 10-19 “Algorithm Identification Macro Attributes”​For Algorithm Family Code Sequence (0066,002F) Defined CID​ 7262 “Diffusion Tractography Algorithm Families”.​

Referenced Instance​

(0008,114A)​

1C​

The set of images used for tractography for all Track Sets within​

Sequence​

 

 

this Instance.​

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

Required if this instance was created from DICOM images.​

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

Attributes”​

C.8.33.2.1 Tractography Results Module Attributes​

This Module encodes one or more Track Sets, each of which consists of one or more Tracks, each of which is defined by one or more​ points.ForeachTrack,optionallyoneormoremeasurementsmaybedefined,eitherforeverypointorasubsetofpoints.Measurements​ aredescribedbycodedtypeandunit.ForeachTrackand/orTrackSet,summarystatisticsderivedfrommeasurementsmaybeincluded​ (whether or not the actual measurements are encoded).​

When a measurement (i.e., an Item of Measurements Sequence (0066,0121) ) is encoded for every point in a track, then Floating​ Point Values (0066,0125) contains the corresponding values for every point. When a measurement is encoded for a subset of points,​ then Floating Point Values (0066,0125) contains measurement values for the points in Point Coordinates Data (0066,0016) which​ are referenced in Track Point Index List (0066,0129).​

More than one Measurements Sequence (0066,0121) Item may be used, for example to encode different types of measurements,​ such as Fractional Anisotropy (FA) and Apparent Diffusion Coefficient (ADC), or to encode different components of a measurement​ thatisatuple,e.g.,adiffusiontensor.Inthelattercase,whichcomponent,andwhichtensor,willbeidentifiedbythefullypre-coordinated​ code in the Concept Name Code Sequence (0040,A043).​

Within one Track Set the different types of measurements or statistics must be the same for all Tracks within that set (i.e., it is not​ allowed to store one track to a set that does not contain a measurement of a specific type in case all other tracks within that set do).​

C.8.33.2.2 Acquisition, Model and Algorithm Attributes​

TheAttributesDiffusionAcquisitionCodeSequence(0066,0133),DiffusionModelCodeSequence(0066,0134)andTrackingAlgorithm​ IdentificationSequence(0066,0104)describethemainparametersinfluencingthetractographycalculation.Theyarefordocumentation​ purposes. With these parameters, a receiver may infer an assessment of the reliability or quality of the tractography result.​

- Standard -​

Page 1254​

DICOM PS3.3 2020a - Information Object Definitions​

C.8.33.3 Summary Statistics Macro​

This Macro encodes summary statistics derived from a set of values.​

Table C.8.33-3. Table Summary Statistics Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

ConceptNameCodeSequence​

(0040,A043)​

1​

Thevalue(quantity)forwhichthestatisticisasummary.​

 

 

 

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

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

 

CID defined by invocation​

Modifier Code Sequence​

(0040,A195)​

1​

Specified the statistic and modifies the Concept Name​

 

 

 

Code Sequence (0040,A0143) of this Macro.​

 

 

 

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

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

 

DCID 7464 “General Region of Interest Measurement​

 

 

 

Modifiers”​

Measurement Units Code​

(0040,08EA)​

1​

Units of measurement for the statistic.​

Sequence​

 

 

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

 

 

 

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

 

DCID 82 “Units of Measurement”.​

Floating Point Value​

(0040,A161)​

1​

The value of the statistic.​

 

 

 

Only a single value shall be present.​

C.9 Overlays​

C.9.1 Overlay Identification Module​

Retired. See PS3.3-2004.​

C.9.2 Overlay Plane Module​

Table C.9-2 contains Attributes that describe characteristics of an Overlay Plane.​

An Overlay Plane describes graphics or bit-mapped text that is associated with an Image. It may also describe a Region of Interest​ in an Image.​

Each Overlay Plane is one bit deep. Sixteen separate Overlay Planes may be associated with an Image.​

Overlay data is stored in Overlay Data (60xx,3000). See the Section Repeating Groups in PS3.5 for a description of permitted values​ of 60xx.​

Note​

Overlay data stored in unused bit planes of Pixel Data (7FE0,0010) with Samples Per Pixel (0028,0002) of 1 was previously​ described in DICOM. This usage has now been retired. See PS3.3-2004 and PS3.5-2004.​

Attributes describing display of grayscale and color overlays were defined in a previous version of the DICOM Standard. These have​ now been retired. How an Overlay Plane is rendered is undefined; specifically there is no mechanism to specify with what color or​ intensity anOverlayPlaneis to bedisplayed,exceptwhen renderedunderthe controlofaSoftcopy PresentationState SOPInstance.​

Table C.9-2. Overlay Plane Module Attributes​

Attribute Name​

Tag​

Type​ Attribute Description​

Overlay Rows​

(60xx,0010)​

1​

Number of Rows in Overlay.​

Overlay Columns​

(60xx,0011)​

1​

Number of Columns in Overlay.​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 1255​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Overlay Type​

(60xx,0040)​

1​ Indicates whether this overlay represents a region of interest or other​

 

 

 

graphics.​

 

 

 

 

Enumerated Values:​

 

 

 

 

G​Graphics​

 

 

 

 

R​ROI​

 

Overlay Origin​

(60xx,0050)​

1​ Location of first overlay point with respect to pixels in the image, given as​

 

 

 

row\column.​

 

 

 

 

The upper left pixel of the image has the coordinate 1\1.​

 

 

 

 

Columnvaluesgreaterthan1indicatetheoverlayplaneoriginistotheright​

 

 

 

of the image origin. Row values greater than 1 indicate the overlay plane​

 

 

 

origin is below the image origin. Values less than 1 indicate the overlay​

 

 

 

plane origin is above or to the left of the image origin.​

 

 

 

 

Note​

 

 

 

 

Values of 0\0 indicate that the overlay pixels start 1 row above​

 

 

 

and one column to the left of the image pixels.​

 

Overlay Bits Allocated​

(60xx,0100)​

1​ Number of Bits Allocated in the Overlay.​

 

The value of this Attribute shall be 1.​

Note​

Formerly the Standard described embedding the overlay data in​ the Image Pixel Data (7FE0,0010), in which case the value of this​ Attribute was required to be the same as Bits Allocated​ (0028,0100). This usage has been retired. See PS3.3-2004.​

Overlay Bit Position​

(60xx,0102)​

1​ The value of this Attribute shall be 0.​

Note​

Formerly the Standard described embedding the overlay data in​ the Image Pixel Data (7FE0,0010), in which case the value of this​ Attribute specified the bit in which the overlay was stored. This​ usage has been retired. See PS3.3-2004.​

Overlay Data​

(60xx,3000)​

1​ Overlay pixel data.​

The order of pixels encoded for each overlay is left to right, top to bottom,​ i.e., the upper left pixel is encoded first followed by the remainder of the​ first row, followed by the first pixel of the 2nd row, then the remainder of​ the 2nd row and so on.​

 

 

Overlay data shall be contained in this Attribute.​

 

 

See Section C.9.2.1.1 for further explanation.​

Overlay Description​

(60xx,0022)​

3​ User-defined comments about the overlay.​

Overlay Subtype​

(60xx,0045)​

3​ DefinedTermthatidentifiestheintendedpurposeoftheOverlayType.See​

 

 

Section C.9.2.1.3 for further explanation.​

Overlay Label​

(60xx,1500)​

3​ A user defined text string that may be used to label or name this overlay.​

ROI Area​

(60xx,1301)​

3​ Number of pixels in ROI area.​

 

 

See Section C.9.2.1.2 for further explanation.​

- Standard -​

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