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DICOM PS3.3 2020a - Information Object Definitions​

Page 1101​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>Filter Material​

(0018,7050)​

1​

The X-Ray absorbing material used in the filter. May be multi-valued.​

 

 

 

See Attribute Description in Section C.8.7.10 for Defined Terms.​

>Filter Thickness Minimum​

(0018,7052)​

3​

See Attribute Description in Section C.8.7.10.​

 

>FilterThicknessMaximum​

(0018,7054)​

3​

See Attribute Description in Section C.8.7.10.​

 

>Filter Beam Path Length​

(0018,7056)​

3​

See Attribute Description in Section C.8.7.10.​

 

Minimum​

 

 

 

 

>Filter Beam Path Length​

(0018,7058)​

3​

See Attribute Description in Section C.8.7.10.​

 

Maximum​

 

 

 

 

>Compression Force​

(0018,11A2)​

1​

The compression force applied to the body part during exposure,​

 

 

 

measured in Newtons.​

 

>Compression Pressure​

(0018,11A3)​

3​

The average compression pressure applied to the body part during​

 

 

 

exposure, calculated in kPa.​

 

>CompressionContactArea​

(0018,11A5)​

3​

The area of the body part to which compression has been applied​

 

 

 

during exposure, measured in mm2.​

 

 

 

 

Note​

 

 

 

 

Area information is useful in addition to the Compression​

 

 

 

Pressure (0018,11A3) and Compression Force (0018,11A2)​

 

 

 

in the event that unusual values are encountered.​

 

>Paddle Description​

(0018,11A4)​

1​

Description of the compression paddle, if compression was applied​

 

 

 

to the body part during exposure.​

 

>Per Projection Acquisition​

(0018,9538)​

1​

Sequence containing detailed acquisition context of each individual​

Sequence​

 

 

projection used in this acquisition context.​

 

 

 

 

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

 

>>Include Table C.8.21.3.1.2-1 “X-Ray 3D General Per​

 

 

Projection Acquisition Macro Attributes”​

 

 

 

>>Positioner Primary Angle​

(0018,1510)​

1​

Signed position in degrees of the X-Ray beam vector in the coronal​

 

 

 

anatomical plane as if the patient were standing facing the equipment​

 

 

 

where vertical is zero.​

 

>>Positioner Primary Angle​

(0018,9559)​

3​

The interpretation of the sign of the Positioner Primary Angle​

Direction​

 

 

(0018,1510).​

 

 

 

 

Enumerated Values:​

 

 

 

 

CW​Clockwise. Positioner Primary Angle movement is positive when​

 

 

 

movement is from vertical to the patient's right (with patient​

 

 

 

standing, facing equipment).​

 

 

 

 

CC​Counter clockwise. Positioner Primary Angle is positive when​

 

 

 

movement is from vertical to the patient's left (with patient​

 

 

 

standing, facing the equipment).​

 

 

 

 

See Section C.8.31.2.1.​

 

>>Positioner Secondary​

(0018,1511)​

1C​

PositionindegreesoftheX-Raybeamvectorinthesagittalanatomical​

Angle​

 

 

plane as if the patient were standing where movement of the X-Ray​

 

 

 

source from anterior to posterior is positive, and vertical is zero.​

 

 

 

Required if secondary positioner was used during acquisition.​

>>Exposure Time in ms​

(0018,9328)​

1​

Duration of X-Ray exposure in milliseconds. See Section C.8.7.2.1.1.​

>>Exposure in mAs​

(0018,9332)​

1​

Theexposureexpressedinmilliampereseconds,forexamplecalculated​

 

 

 

from Exposure Time and X-Ray Tube Current.​

 

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Page 1102​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

 

Attribute Description​

>>RelativeX-RayExposure​

(0018,1405)​

1​

Indication of the applied dose, in manufacturer specific units.​

 

 

 

Note​

 

 

 

1.​Thisvalueisintendedtoprovideasinglelocationwhere​

 

 

 

 

manufacturer specific information can be found for​

 

 

 

 

annotation on a display or film, that has meaning to a​

 

 

 

 

knowledgeable observer.​

 

 

 

2.​This may be a calculated or measured value. Examples​

 

 

 

 

are the detector entrance dose (KB), the CR sensitivity​

 

 

 

 

value (S), or the logarithmic median (lgM).​

 

 

 

3.​This value is manufacturer-specific. DICOM specifies​

 

 

 

 

Standard Attributes in Table 10-23 'Exposure Index​

 

 

 

 

Macro', which are recommended.​

>>Organ Dose​

(0040,0316)​

3​

Average organ dose value measured in dGy.​

 

 

 

Note​

 

 

 

This may be an estimated value.​

>>Entrance Dose in mGy​

(0040,8302)​

3​

Average entrance dose value measured in mGy at the surface of the​

 

 

 

patient during the acquisition of this projection image.​

 

 

 

Note​

 

 

 

Thismaybeanestimatedvaluebasedonassumptionsabout​

 

 

 

the patient's body size and habitus.​

>>EntranceDoseDerivation​

(0040,8303)​

3​

Describes what type of dose is represented by the values of Entrance​

 

 

 

Dose in mGy (0040,8302).​

 

 

 

Enumerated Values:​

 

 

 

IAK​

Represents air kerma at the entrance surface, no​

 

 

 

 

backscatter included, no air kerma to tissue dose​

 

 

 

 

conversion applied.​

 

 

 

ESAK​ Represents air kerma at the entrance surface, with​

 

 

 

 

backscatter included, no air kerma to tissue dose​

 

 

 

 

conversion applied.​

 

 

 

ESDBS​ Represents absorbed dose in tissue at the entrance​

 

 

 

 

surface, with backscatter included.​

 

 

 

ESDNOBS​Represents absorbed dose in tissue at the entrance​

 

 

 

 

surface, without backscatter included.​

 

 

 

Only meaningful if Entrance Dose in mGy (0040,8302) is present.​

>>Include Table 10-23 “Exposure Index Macro Attributes”​

 

 

>>Irradiation Event UID​

(0008,3010)​

3​

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

 

 

 

acquisition of this image.​

C.8.21.4 X-Ray 3D Reconstruction Module​

ThissectiondescribestheX-Ray3DReconstructionModule.TableC.8.21.4-1containsIODAttributesthatdescribethereconstructions​ usedtocreatethisSOPInstance.AsingleSOPInstancemaycontaintheresultofoneormorereconstructions(e.g.,asetofvolumes).​ Each Item in the X-Ray 3D Reconstruction Sequence specifies the characteristics of such a result.​

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DICOM PS3.3 2020a - Information Object Definitions​ Page 1103​

Table C.8.21.4-1. X-Ray 3D Reconstruction Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

X-Ray 3D Reconstruction​

(0018,9530)​

1​ ASequenceofItemseachdescribingthecharacteristicsofone​

Sequence​

 

 

3D reconstruction included in this SOP instance.​

 

 

 

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

>Reconstruction Description​

(0018,9531)​

3​ Free text description of the purpose of the reconstruction, e.g.,​

 

 

 

mask volume.​

>Application Name​

(0018,9524)​

1​ Name of the application that created the reconstruction.​

>Application Version​

(0018,9525)​

1​ Version of the application that created the reconstruction.​

>Application Manufacturer​

(0018,9526)​

1​ Name of the manufacturer of the application that created the​

 

 

 

reconstruction.​

>Algorithm Type​

(0018,9527)​

1​ Type of algorithm used to create the reconstruction.​

 

 

 

Defined Terms:​

 

 

 

FILTER_BACK_PROJ​

 

 

 

ITERATIVE​

>Algorithm Description​

(0018,9528)​

3​ Description of the algorithm used to create the reconstruction.​

>Acquisition Index​

(0020,9518)​

1​ The Item number(s) of the X-Ray 3D Acquisition Sequence​

 

 

 

(0018,9507) that describes the acquisition context(s)​

 

 

 

contributing to this reconstruction.​

C.8.21.5 X-Ray 3D Image Functional Group Macros​

The following sections contain Functional Group Macros specific to the X-Ray 3D IOD.​

Note​

The Attribute descriptions in the Functional Group Macros are written as if they were applicable to a single frame (i.e., the​ Macro is part of the Per-frame Functional Groups Sequence). If an Attribute is applicable to all frames (i.e., the Macro is part​ of the Shared Functional Groups Sequence) the phrase "this frame" in the Attribute description shall be interpreted to mean​ " for all frames".".​

C.8.21.5.1 X-Ray 3D Frame Type Macro​

Table C.8.21.5.1-1 specifies the Attributes of the X-Ray 3D Frame Type Functional Group Macro.​

Table C.8.21.5.1-1. X-Ray 3D Frame Type Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

X-Ray 3D Frame Type​

(0018,9504)​

1​

A Sequence that describes general characteristics of this frame.​

Sequence​

 

 

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

 

 

 

>Frame Type​

(0008,9007)​

1​

Type of Frame. A multi-valued Attribute analogous to Image Type​

 

 

 

(0008,0008).​

Enumerated Values and Defined Terms are the same as those for​ the four values of Image Type (0008,0008), except that the value​ MIXED is not allowed. See Section C.8.21.1.1.1. For Breast​ Tomosynthesis Image See Section C.8.21.6.1.1.​

>Include Table C.8-131 “Common CT/MR Image Description​

Macro Attributes”​

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Page 1104​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>Reconstruction Index​

(0020,9536)​

1C​

The Item number of the X-Ray 3D Reconstruction Sequence​

 

 

 

(0018,9530) that describes the characteristics of the 3D​

 

 

 

Reconstruction to which this frame is part of.​

Required if the X-Ray 3D Reconstruction Sequence (0018,9530)​ is present.​

C.8.21.5.2 Breast Biopsy Target Macro​

Table C.8.21.5.2-1 specifies the Attributes of the Breast Biopsy Target Functional Group Macro.​

Table C.8.21.5.2-1. Breast Biopsy Target Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Biopsy Target Sequence​

(0018,2041)​

1C​

Sequence that identifies the targets of a biopsy procedure. One or more​

 

 

 

Items are permitted in this Sequence for this frame, where the coordinate​

 

 

 

system is the same for all Items within a pair of stereo images.​

 

 

 

Required if one or more biopsy targets are present for this frame.​

>Target UID​

(0018,2042)​

1​

Unique identifier for the target.​

 

 

 

Note​

 

 

 

To identify the same target in corresponding stereo images.​

>Localizing Cursor​

(0018,2043)​

1​

Coordinates of localizing cursor position with respect to pixels in the image​

Position​

 

 

specified by a column (delimiter) row pair. The values shall be in the range​

 

 

 

0\0 (TLHC) to Columns\Rows (BRHC).​

>Calculated Target​

(0018,2044)​

1​

The calculated target position (x, y, z) in mm in an equipment relative​

Position​

 

 

right-handed coordinate system where the origin is under the central X-Ray​

 

 

 

beam at the chest wall, and a z value of zero is located at the surface that​

 

 

 

the breast is in contact with that is closest to the detector.​

 

 

 

X is parallel to the chest wall, y is positive toward the patient's nipple, and z​

 

 

 

is positive toward the X-Ray source.​

>Displayed Z Value​

(0018,2046)​

1​

The z value in mm displayed to the user at the time of biopsy.​

 

 

 

Note​

 

 

 

1.​This may be the same as the z value of Calculated Target​

 

 

 

Position or different in direction or reference point, such as​

 

 

 

relative to the compression paddle.​

 

 

 

2.​Thisisnotthedistancethattheneedlewasinserted,particularly​

 

 

 

for a lateral (parallel) approach.​

>Target Label​

(0018,2045)​

3​

Target description.​

C.8.21.6 Breast View Module​

Table C.8.21.6-1 contains IOD Attributes that describe the view of a digital breast tomosynthesis image.​

Table C.8.21.6-1. Breast View Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Image Type​

(0008,0008)​

1​

Image identification characteristics.​

 

 

 

See Section C.8.21.6.1.1 for specialization.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1105​

Attribute Name​

Tag​

Type​

Attribute Description​

 

View Code Sequence​

(0054,0220)​

1​

Sequencethatdescribestheviewofthepatientanatomyinthisimage.​

 

 

 

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

 

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

DCID 4014 “View for Mammography”.​

 

>View Modifier Code​

(0054,0222)​

2​

Sequence that provides modifiers for the view of the patient anatomy.​

Sequence​

 

 

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

 

 

 

 

 

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

DCID 4015 “View Modifier for Mammography”.​

 

Breast Implant Present​

(0028,1300)​

1C​

Whetherornottheimagedbreastcontainsabreastimplantregardless​

 

 

 

of the visibility of a breast implant in the Pixel Data.​

 

 

 

 

Enumerated Values:​

 

 

 

 

YES​

 

 

 

 

NO​

 

 

 

 

Required if Modality (0008,0060) is MG. May be present otherwise.​

 

 

 

Note​

 

 

 

 

The value is expected to be YES for all images acquired on​

 

 

 

a breast that contains a breast implant, even when a breast​

 

 

 

implant is displaced during image acquisition.​

 

Partial View​

(0028,1350)​

3​

Indicates whether this image is a partial view, that is a subset of a​

 

 

 

single view of the breast.​

 

 

 

 

Enumerated Values:​

 

 

 

 

YES​

 

 

 

 

NO​

 

 

 

 

If this Attribute is absent, then the image may or may not be a partial​

 

 

 

view.​

 

 

 

 

Note​

 

 

 

 

This may occur when a breast is larger than the active area​

 

 

 

of the detector.​

 

 

 

 

If this Attribute is present, its value shall be NO if there is a View​

 

 

 

ModifierCodeSequence(0054,0222)Itemofvalue(399163009,SCT,​

 

 

 

"Magnification") or (399055006, SCT, "Spot Compression").​

Partial View Code​

(0028,1352)​

1C​

Sequence that describes the portion or section of the breast captured​

Sequence​

 

 

in a partial view image.​

 

 

 

 

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

 

 

 

 

See Section C.8.11.7.1.3.​

 

 

 

 

Required if Partial View (0028,1350) is present with a value of YES.​

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

DCID 4005 “Partial View Section for Mammography”.​

 

C.8.21.6.1 Breast View Module Attribute Description​

C.8.21.6.1.1 Image Type and Frame Type​

InadditiontotherequirementsspecifiedinSectionC.8.21.1.1.1ImageTypeandFrameType,thefollowingDefinedTermsarespecified​ for Value 3 of Image Type (0008,0008) and Frame Type (0008,9007):​

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