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 and Image Pixel Modules, and adding additional Attributes.

Table C.8.21.1-1X-Ray 3D IMAGE MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Image Type (0008,0008) 1 Image identification characteristics. See C.8.21.1.1.1 for specialization.
Include ‘Common CT/MR Image Description Macro’ Table C.8-131
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 and 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 to16.
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.
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 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 Features (0028,0302) 3 Indicates whether or not the image contains sufficiently recognizable 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. Enumerated Values: 00 = Image has NOT been subjected to lossy compression. 01 = Image has been subjected to lossy compression. See C.7.6.1.1.5 for further explanation.
Lossy Image Compression Ratio (0028,2112) 1C See C.7.6.1.1.5 for further explanation. Required if Lossy Image Compression (0028,2110) equals 01.
Lossy Image Compression Method (0028,2114) 1C A label for the lossy compression method(s) that have been applied to this image. See C.7.6.1.1.5 for further explanation. May be multi-valued if successive lossy compression steps have been applied; the value order shall correspond to the values of Lossy Image Compression Ratio (0028,2112). Note: For historical reasons, the lossy compression method may also be described in Derivation Description (0008,2111). Required if Lossy Image Compression (0028,2110) equals 01.
Referenced Image Evidence Sequence (0008,9092) 1C Full set of Composite SOP Instances referred to inside the Referenced Image Sequences of this SOP Instance. See C.8.13.2.1.2 for further explanation. One or more Items shall be included in this sequence. Required if the Referenced Image Sequence (0008,1140) is present.
>Include ‘Hierarchical SOP Instance Reference Macro’ Table C.17-3
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 If this Attribute is absent, then the image may or may not be a quality 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 ‘Image Pixel Macro’ Table C.7-11b See 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

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 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 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 C.8.16.1.2. No additional requirements or Defined Terms.

C.8.21.1.1.1.3 Image Flavor

Value 3 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in 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 C.8.16.1.4.The value shall be NONE.

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

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

Notes: 1.These modules supply general information of the sources without the need to have access to all the contributing SOP Instances or when these SOP Instances do not exist.

2. These modules do not contain specific information of the X-Ray acquisition itself. For this purpose the X-Ray 3D Acquisition Modules may be used.

C.8.21.2.1 X-Ray 3D Angiographic Image Contributing Sources Module

This section describes the X-Ray 3D Angiographic Image Contributing Sources Module. The attributes in this Module specify the overall characteristics of one or more sources that were used to create a X-Ray 3D Angiographic Image SOP Class instance. Table C.8.21.2.1-1 contains the relevant IOD Attributes that describe X-Ray 3D Angiographic Image Contributing Sources.

Table C.8.21.2.1-1 X-RAY 3D ANGIOGRAPHIC IMAGE CONTRIBUTING SOURCES MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Contributing Sources Sequence (0018,9506) 1 A sequence that describes characteristics of the sources that are used to create a derived SOP Instance. One or more Items shall be included in this sequence.
>Include ‘General Contributing Sources Macro’ Table 10-13
>Include ‘Contributing Image Sources Macro’ Table 10-14
>Acquisition Device Processing Description (0018,1400) 1C Indicates any visual processing performed on the frame prior to exchange. See Section C.8.7.1.1.3. Required if present and consistent in the contributing SOP Instances.
>Acquisition Device Processing Code (0018,1401) 1C Code representing the device-specific processing associated with the frame (e.g. Organ Filtering code) Required if present and have an equal value in the contributing SOP Instances.
>Plane Identification (0018,9457) 1C Identification of the plane used to acquire this image. Defined Terms: MONOPLANE PLANE A PLANE B Required if present and consistent in the contributing SOP Instances.
>Imager Pixel Spacing (0018,1164) 1C Physical distance measured at the receptor plane of the detector between the centers of each pixel specified by a numeric pair - row spacing value (delimiter) column spacing value in mm. Required if present and consistent in the contributing SOP Instances.

C.8.21.2.2 X-Ray 3D Craniofacial Image Contributing Sources Module

This section describes the X-Ray 3D Craniofacial Image Contributing Sources Module. The attributes in this Module specify the overall characteristics of one or more sources that were used to create a X-Ray 3D Craniofacial Image SOP Class instance. Table C.8.21.2.2-1 contains the relevant IOD Attributes that describe X-Ray 3D Craniofacial Image Contributing Sources.

Table C.8.21.2.2-1 X-RAY 3D CRANIOFACIAL IMAGE CONTRIBUTING SOURCES MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Contributing Sources Sequence (0018,9506) 1 A sequence that describes characteristics of the sources that are used to create a derived SOP Instance. One or more Items shall be included in this sequence.
>Include ‘General Contributing Sources Macro’ Table 10-13
>Include ‘Contributing Image Sources Macro’ Table 10-14
>Acquisition Device Processing Description (0018,1400) 1C Indicates any visual processing performed on the frame prior to exchange. See Section C.8.7.1.1.3. Required if present and consistent in the contributing SOP Instances.
>Acquisition Device Processing Code (0018,1401) 1C Code representing the device-specific processing associated with the frame (e.g. Organ Filtering code). Required if present and have an equal value in the contributing SOP Instances.
>Imager Pixel Spacing (0018,1164) 1C Physical distance measured at the receptor plane of the detector between the centers of each pixel specified by a numeric pair - row spacing value (delimiter) column spacing value in mm. Required if present and consistent in the contributing SOP Instances.

C.8.21.2.3 Breast Tomosynthesis Contributing Sources Module

This section describes the Breast Tomosynthesis Contributing Sources Module. The attributes in this Module specify the overall characteristics of one or more source images that were used to create a Breast Tomosynthesis Image SOP Class instance. Table C.8.21.2.3-1 contains the IOD Attributes that describe Breast Tomosynthesis Contributing Sources.

Note: The intention of this module is to supply acquisition information without the need to have access to all the source projection images.

Table C.8.21.2.3-1 BREAST TOMOSYNTHESIS CONTRIBUTING SOURCES MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
Contributing Sources Sequence (0018,9506) 1 A sequence that describes characteristics of the sources that are used to create a derived SOP Instance. One or more Items shall be included in this sequence.
>Include ‘General Contributing Sources Macro’ Table 10-13
>Include ‘Contributing Image Sources Macro’ Table 10-14
>Detector Type (0018,7004) 1 The type of detector used to acquire this image. Defined Terms: DIRECT = X-Ray photoconductor SCINTILLATOR = Phosphor used STORAGE = Storage phosphor
>Detector ID (0018,700A) 1 The ID or serial number of the detector used to acquire this image.
>Date of Last Detector Calibration (0018,700C) 1 The date on which the detector used to acquire this image as identified in Detector ID (0018,700A) was last calibrated.
>Time of Last Detector Calibration (0018,700E) 1 The time at which the detector used to acquire this image as identified in Detector ID (0018,700A) was last calibrated.
>Detector Element Spacing (0018,7022) 1 Physical distance between the center of each detector element, specified by a numeric pair: row spacing value (delimiter) column spacing value in mm. See 10.7.1.3 for further explanation of the value order. Note: This may not be the same as the Imager Pixel Spacing (0018,1164), and should not be assumed to describe the stored image.

C.8.21.3 X-Ray 3D Acquisition Modules

This section describes the X-Ray 3D Acquisition Modules and Macros to specify the acquisition context information used as input for one or more reconstructions. The Macros in this section define the attributes that are common for all modalities. The Macros are used in the modality specific Modules.

The attributes of each item in the X-Ray 3D Acquisition Sequence (0018,9507) define the acquisition characteristics of the projection images that were used to create one or more reconstructions.

Notes: 1. The intention of this sequence is to supply acquisition information without the need to have access to all the contributing SOP Instances or when these SOP Instances do not exist.

2. The number of frames referenced in this sequence is not necessarily the same as the number of projection images.

For each item of the X-Ray 3D Reconstruction Sequence (0018,9530) in the X-Ray 3D Reconstruction Module, the values of the Acquisition Index (0020,9518) attribute specify the items in the X-Ray 3D Acquisition Sequence (0018,9507) that contribute to the reconstruction.

Note: For example, a SOP Instance consists of two volumes in two sets of frames. The first volume is calculated from an acquisition without contrast and a second volume is calculated from the acquisitions with and without contrast. In this case the X-Ray 3D Acquisition Sequence (0018,9507) contains two items. The first Item describes the acquisition details of the frames that are acquired without contrast. The second Item describes the acquisition details of the frames that are acquired with contrast. For the frames of the second volume both acquisitions contribute to the calculation. See Figures C.8.21.3-1 thru C.8.21.3-5

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Figure C.8.21.3-1 Example of usage Acquisition

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Figure C.8.21.3-2 Example of contents of Contributing Sources Sequence

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Figure C.8.21.3-3 Example of contents of X-Ray 3D Acquisition Sequence

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Figure C.8.21.3-4 Example of contents of X-Ray 3D Reconstruction Sequence

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Figure C.8.21.3-5 Example of contents of X-Ray 3D Frame Type Sequences

C.8.21.3.1 X-Ray 3D General Acquisition Macros

This section describes the X-Ray 3D General Acquisition Macros. These macros specify the attributes of the acquisition context common for the family of X-Ray 3D image SOP Classes.

C.8.21.3.1.1 X-Ray 3D General Shared Acquisition Macro

Table C.8.21.3.1.1-1 describes the X-Ray 3D General Shared Acquisition Macro that specifies the attributes that are applicable for all the projection images belonging to this application context.

Table C.8.21.3.1.1-1X-RAY 3D GENERAL SHARED ACQUISITION MACRO

Attribute Name Tag Type Attribute Description
Source Image Sequence (0008,2112) 1C A Sequence that identifies the set of Images that constitute this acquisition context. Required if the reconstruction is created from DICOM SOP Instances. Note: The attribute is absent in the case where the images used to create the volume are not available as SOP Instances, e.g., the volume was directly generated by acquisition system. One or more Items shall be included in this Sequence.
>Include ‘Image SOP Instance Reference Macro’ Table 10-3
Field of View Dimension(s) in Float (0018,9461) 1C Dimensions in mm of the Field of View in the source projection images. If Field of View Shape (0018,1147) is: RECTANGLE: row dimension followed by column. ROUND: diameter. HEXAGONAL: diameter of the circle circumscribing the hexagon. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Field of View Origin (0018,7030) 1C Offset of the TLHC of a rectangle circumscribing the Field of View in the referenced images, before rotation or flipping, from the TLHC of the physical detector area measured in physical detector pixels as a row offset followed by a column offset. See C.8.11.4.1.1 for further explanation. Required if X-Ray Receptor Type (0018,9420) is present and equals DIGITAL_DETECTOR.
Field of View Rotation (0018,7032) 1C Clockwise rotation in degrees of Field of View in the referenced images, relative to the physical detector. Enumerated Values: 0, 90, 180, 270 See C.8.11.4.1.1 for further explanation. Required if present and consistent in the contributing SOP Instances.
Field of View Horizontal Flip (0018,7034) 1C Whether or not a horizontal flip has been applied to the Field of View in the referenced images, after rotation relative to the physical detector as described in Field of View Rotation (0018,7032). Enumerated Values: NO YES See C.8.11.4.1.1 for further explanation. Required if present and consistent in the contributing SOP Instances.
Grid (0018,1166) 1C Identifies the grid. May be multi-valued. See Attribute Description in Section C.8.7.11 for Defined Terms. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Include ‘X-Ray Grid Description Macro’ Table C.8-36b
KVP (0018,0060) 1C Average of the peak kilo voltage outputs of the X-Ray generator used for all frames. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
X-Ray Tube Current in mA (0018,9330) 1C Average of the nominal X-Ray tube currents in milliamperes for all frames. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Exposure Time in ms (0018,9328) 1C Total (cumulative) duration of X-Ray exposure for all frames in milliseconds. See C.8.7.2.1.1. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Exposure in mAs (0018,9332) 1C The total (cumulative) exposure for all frames expressed in milliampereseconds, for example calculated from Exposure Time and X-Ray Tube Current. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Contrast/Bolus Agent (0018,0010) 1C Contrast or bolus agent. Required if present and consistent in the contributing SOP Instances.
Contrast/Bolus Agent Sequence (0018,0012) 1C Sequence that identifies the contrast agent. One or more Items shall be included in this sequence. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG and contrast media was applied.
>Include ‘Code Sequence Macro’ Table 8.8-1 Baseline CID 12.
Start Acquisition DateTime (0018,9516) 1C Start date and time of that part of an acquisition used for this acquisition context. Required if present and consistent in the contributing SOP Instances.
End Acquisition DateTime (0018,9517) 1C End date and time of that part of an acquisition used for this acquisition context. Required if present and consistent in the contributing SOP Instances.

C.8.21.3.1.2 X-Ray 3D General Per Projection Acquisition Macro

Table C.8.21.3.1.2-1 describes the X-Ray 3D General Per Projection Acquisition Macro that specifies the attributes that are applicable for a single projection belonging to this application context.

Table C.8.21.3.1.2-1X-RAY 3D GENERAL PER PROJECTION ACQUISITION MACRO

Attribute Name Tag Type Attribute Description
KVP (0018,0060) 1C Exact peak kilo voltage output of the X-Ray generator used for this projection. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
X-Ray Tube Current in mA (0018,9330) 1C Exact Nominal X-Ray tube current in milliamperes applied during the Frame Acquisition Duration (0018,9220) for this projection. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Frame Acquisition Duration (0018,9220) 1C The actual amount of time [in milliseconds] that was used to acquire data for this projection. See C.7.6.16.2.2.1 and C.7.6.16.2.2.3 for further explanation. Required if present and consistent in the contributing SOP Instances.
Collimator Shape (0018,1700) 1C Shape(s) of the collimator. Enumerated Values: RECTANGULAR CIRCULAR POLYGONAL This multi-valued Attribute shall contain at most one of each Enumerated Value. Required if present and consistent in the contributing SOP Instances.
Include ‘X-Ray Collimator Dimensions Macro’ Table C.8-28b

C.8.21.3.1.3 X-Ray 3D General Positioner Movement Macro

Table C.8.21.3.1.3-1 describes the X-Ray 3D General Positioner Movement Macro that specifies the Attributes that describe the movement of a positioner during the acquisition of more than one projection.

Table C.8.21.3.1.3-1X-RAY 3D GENERAL POSITIONER MOVEMENT MACRO

Attribute Name Tag Type Attribute Description
Primary Positioner Scan Arc (0018,9508) 1C Total amount of rotation of the primary positioner in degrees. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Primary Positioner Scan Start Angle (0018,9510) 1C Start position of the primary positioner in degrees. See C.8.7.5.1.2 or C.8.11.7, depending on modality and positioner type. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Primary Positioner Increment (0018,9514) 1C Nominal increment of the primary positioner angle in degrees. Positive values indicate moving from RAO to LAO position through the anterior, or right to vertical. See C.8.7.5.1.2 or C.8.11.7, depending on modality and positioner type. Required if present and consistent in the contributing SOP Instances. Required if Modality (0008,0060) is MG.
Secondary Positioner Scan Arc (0018,9509) 1C Total amount of rotation of the secondary positioner in degrees. Required if present and consistent in the contributing SOP Instances.
Secondary Positioner Scan Start Angle (0018,9511) 1C Start position of the secondary positioner in degrees. See C.8.7.5.1.2 or C.8.11.7, depending on modality and positioner type. Required if present and consistent in the contributing SOP Instances.
Secondary Positioner Increment (0018,9515) 1C Nominal increment of the secondary positioner angle in degrees. Positive values indicate moving from CAU to CRA through the anterior, or from anterior to posterior. See C.8.7.5.1.2 or C.8.11.7, depending on modality and positioner type. Required if present and consistent in the contributing SOP Instances.

C.8.21.3.2 X-Ray 3D Angiographic Acquisition Module

This section describes the X-Ray 3D Angiographic Acquisition Module.

Table C.8.21.3.2-1 X-RAY 3D ANGIOGRAPHIC ACQUISITION MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
X-Ray 3D Acquisition Sequence (0018,9507) 1 Each item represents an acquisition context related to one or more reconstructions. The values of the Acquisition Index (0020,9518) attribute may be used as index to Items in this sequence. One or more Items shall be included in this sequence.
>Field of View Shape (0018,1147) 1C Shape of the Field of View in the referenced images. Enumerated Values: RECTANGLE ROUND HEXAGONAL Required if present and consistent in the contributing SOP Instances.
>X-Ray Receptor Type (0018,9420) 1C Identifies the type of X-Ray receptor used. Enumerated Values: IMG_INTENSIFIER DIGITAL_DETECTOR Required if present and consistent in the contributing SOP Instances.
>Include ‘X-Ray 3D General Shared Acquisition Macro’ Table C.8.21.3.1.1-1
>Include ‘Digital X-Ray Detector Macro’ Table C.8-71b
>Physical Detector Size (0018,9429) 1C Dimensions of the physical detector measured in mm as a row size followed by a column size. Required if present and consistent in the contributing SOP Instances.
>Position of Isocenter Projection (0018,9430) 1C Position of the Isocenter measured in physical detector elements as a row offset followed by a column offset from the TLHC of a rectangle circumscribing the physical detector area. Required if Isocenter Reference System Sequence (0018,9462) is present and if the values are present and consistent in the contributing SOP Instances.
>Distance Source to Detector (0018,1110) 1C Distance from source to receptor plane perpendicular to the receptor plane in mm or distance in mm from source to detector center on the chest wall line See C.8.11.7.1.1. Required if present and consistent in the contributing SOP Instances. Note: This value is traditionally referred to as Source Image Receptor Distance (SID).
>Distance Source to Isocenter (0018,9402) 1C Distance from source to isocenter in mm. Required if present and consistent in the contributing SOP Instances.
>Focal Spot (0018,1190) 1C Nominal focal spot size in mm used to acquire this image. Required if present and consistent in the contributing SOP Instances.
>Filter Type (0018,1160) 1C Type of filter(s) inserted into the X-Ray beam (e.g. wedges). See Attribute Description in Section C.8.7.10 for Defined Terms. Note: Multiple type of filters can be expressed by a combination, e.g., BUTTERFLY+WEDGE. Required if present and consistent in the contributing SOP Instances.
>Filter Material (0018,7050) 1C 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. Required if present and consistent in the contributing SOP Instances.
>Filter Thickness Minimum (0018,7052) 1C See Attribute Description in Section C.8.7.10 . Required if present and consistent in the contributing SOP Instances.
>Filter Thickness Maximum (0018,7054) 1C See Attribute Description in Section C.8.7.10 . Required if present and consistent in the contributing SOP Instances.
>Filter Beam Path Length Minimum (0018,7056) 1C See Attribute Description in Section C.8.7.10. Required if present and consistent in the contributing SOP Instances.
>Filter Beam Path Length Maximum (0018,7058) 1C See Attribute Description in Section C.8.7.10. Required if present and consistent in the contributing SOP Instances.
>Include ‘X-Ray 3D General Positioner Movement Macro’ Table C.8.21.3.1.3-1
>Per Projection Acquisition Sequence (0018,9538) 1C Sequence containing detailed acquisition context of each individual projection used in this acquisition context. One or more Items shall be included in this sequence. Required if present and consistent in the contributing SOP Instances.
>>Include ‘X-Ray 3D General Per Projection Acquisition Macro’ Table C.8.2.3.1.2-1
>>Positioner Isocenter Primary Angle (0018,9463) 1C Position of the X-Ray center beam for this projection in the isocenter reference system in the X direction (deg). See C.8.19.6.13.1.2 for further explanation. Required if present and consistent in the contributing SOP Instances.
>>Positioner Isocenter Secondary Angle (0018,9464) 1C Position of the X-Ray center beam for this projection in the isocenter reference system in the Z direction (deg). See C.8.19.6.13.1.2 for further explanation. Required if present and consistent in the contributing SOP Instances.
>>Positioner Isocenter Detector Rotation Angle (0018,9465) 1C Rotation of the X-Ray detector plane for this projection (deg). See C.8.19.6.13.1.2 for further explanation. Required if present and consistent in the contributing SOP Instances.

C.8.21.3.3 X-Ray 3D Craniofacial Acquisition Module

This section describes the X-Ray 3D Craniofacial Acquisition Module.

Table C.8.21.3.3-1 X-RAY 3D CRANIOFACIAL ACQUISITION MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
X-Ray 3D Acquisition Sequence (0018,9507) 1 Each item represents a acquisition context related to a set of frames of SOP Instance defined by this IOD, The values of the Acquisition Index (0020,9518) attribute may be used as index to Items in this sequence. One or more Items shall be included in this sequence.
>Field of View Shape (0018,1147) 1C Shape of the Field of View in the referenced images. Enumerated Values: RECTANGLE ROUND HEXAGONAL Required if present and consistent in the contributing SOP Instances.
>X-Ray Receptor Type (0018,9420) 1C Identifies the type of X-Ray receptor used. Enumerated Values: DIGITAL_DETECTOR Required if present and consistent in the contributing SOP Instances.
>Include ‘X-Ray 3D General Shared Acquisition Macro’ Table C.8.2.3.1.1-1
>Include ‘Digital X-Ray Detector Macro’ Table C.8-71b
>Per Projection Acquisition Sequence (0018,9538) 1C Sequence containing detailed acquisition context of each individual projection used in this acquisition context. One or more Items shall be included in this sequence. Required if present and consistent in the contributing SOP Instances.
>>Include ‘X-Ray 3D General Per Projection Acquisition Macro’ Table C.8.2.3.1.2-1

C.8.21.3.4 Breast Tomosynthesis Acquisition Module

This section describes the Breast Tomosynthesis Acquisition Module.

Table C.8.21.3.4-1 BREAST TOMOSYNTHESIS ACQUISITION MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
X-Ray 3D Acquisition Sequence (0018, 9507) 1 Each Item represents an acquisition context related to one or more reconstructions. The values of the Acquisition Index (0020,9518) attribute may be used as index in this sequence. One or more Items shall be included in this sequence.
>Field of View Shape (0018,1147) 1 Shape of the Field of View in the source projection images. Enumerated Values: RECTANGLE
>Include ‘X-Ray 3D General Shared Acquisition Macro’ Table C.8.21.3.1.1-1
>Include ‘X-Ray 3D General Positioner Movement Macro’ Table C.8.21.3.1.3-1
>Distance Source to Detector (0018,1110) 1 Distance in mm from source to detector center on the chest wall line. Notes: 1. This value is traditionally referred to as Source Image Distance (SID). 2. See C.8.11.7.1.1.
>Distance Source to Patient (0018,1111) 1 Distance in mm from source to the bucky side that is closest to the Imaging Subject, as measured along the X-Ray beam vector. Notes: 1. This value is traditionally referred to as Source Object Distance (SOD). 2. See notes for this attribute in C.8.11.5 DX Positioning Module. 3. See C.8.11.7.1.1 for description of X-Ray beam vector.
>Estimated Radiographic Magnification Factor (0018,1114) 1 Ratio of Source Image Receptor Distance (SID) over Source Object Distance (SOD).
>Anode Target Material (0018,1191) 1 The primary material in the anode of the X-Ray source. Defined Terms: TUNGSTEN MOLYBDENUM RHODIUM
>Body Part Thickness (0018,11A0) 1 The average thickness in mm of the body part examined when compressed, if compression has been applied during exposure.
>Exposure Control Mode (0018,7060) 1 Type of exposure control. Defined Terms: MANUAL AUTOMATIC
>Exposure Control Mode Description (0018,7062) 1 Text description of the mechanism of exposure control. May describe the number and type of exposure sensors or position of the sensitive area of the imaging detector.
>Half Value Layer (0040,0314) 1 The thickness of Aluminum in mm required to reduce the X-Ray Output (0040,0312) by a factor of two. Note: This value may be a calibrated value rather than measured during the exposure.
>Focal Spot (0018,1190) 1 Nominal focal spot size in mm used to acquire the projection images.
>Detector Binning (0018,701A) 1C Number of active detectors used to generate a single pixel. Specified as number of row detectors per pixel then column. Required if detector binning was applied to the projection images.
>Detector Temperature (0018,7001) 1 Detector temperature during exposure in degrees Celsius.
>Filter Type (0018,1160) 1 Type of filter(s) inserted into the X-Ray beam (e.g. wedges). See Attribute Description in Section C.8.7.10 for Defined Terms.
>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.
>Filter Thickness Maximum (0018,7054) 3 See Attribute Description in Section C.8.7.10.
>Filter Beam Path Length Minimum (0018,7056) 3 See Attribute Description in Section C.8.7.10.
>Filter Beam Path Length Maximum (0018,7058) 3 See Attribute Description in Section C.8.7.10.
>Per Projection Acquisition Sequence (0018,9538) 1 Sequence containing detailed acquisition context of each individual projection used in this acquisition context. One or more Items shall be included in this sequence.
>>Include ‘X-Ray 3D General Per Projection Acquisition Macro’ Table C.8.21.3.1.2-1
>>Positioner Primary Angle (0018,1510) 1 Position in degrees of the X-Ray beam vector in the coronal anatomical plane as if the patient were standing where movement of the X-Ray source from right to vertical is positive, and vertical is zero.
>>Positioner Secondary Angle (0018,1511) 1C Position in degrees of the X-Ray beam vector in the sagittal anatomical 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 C.8.7.2.1.1.
>>Exposure in mAs (0018,9332) 1 The exposure expressed in milliampereseconds, for example calculated from Exposure Time and X-Ray Tube Current.
>>Relative X-Ray Exposure (0018,1405) 1 Indication of the applied dose, in manufacturer specific units. Notes: 1. This value is intended to provide a single location where 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: This may be an estimated value based on assumptions about the patient’s body size and habitus.
>>Include Table 10-23 ‘Exposure Index Macro’

C.8.21.4 X-Ray 3D Reconstruction Module

This section describes the X-Ray 3D Reconstruction Module. Table C.8.21.4-1 contains IOD Attributes that describe the reconstructions used to create this SOP Instance. A single SOP Instance may contain the result of one or more reconstructions (e.g., a set of volumes). Each item in the X-Ray 3D Reconstruction Sequence specifies the characteristics of such a result.

Table C.8.21.4-1 X-RAY 3D RECONSTRUCTION MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
X-Ray 3D Reconstruction Sequence (0018,9530) 1 A sequence of Items each describing the characteristics of one 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.8.21.5.1-1X-RAY 3D FRAME TYPE MACRO ATTRIBUTES

Attribute Name Tag Type Attribute Description
X-Ray 3D Frame Type Sequence (0018,9504) 1 A sequence that describes general characteristics of this frame. Only a single Item shall be included in this sequence.
>Frame Type (0008,9007) 1 Type of Frame. A multi-valued attribute analogous to the Image Type (0008,0008). Enumerated Values and Defined Terms are the same as those for the four values of the Image Type (0008,0008) attribute, except that the value MIXED is not allowed. See C.8.21.1.1.1.
>Include Common CT/MR Image Description Macro’ Table C.8-131
>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.8.21.6 Breast View Module

Table C.8.21.6-1 contains IOD Attributes that describe the view of a Breast Tomosynthesis Image.

Table C.8.21.6-1 BREAST VIEW MODULE ATTRIBUTES

Attribute Name Tag Type Attribute Description
View Code Sequence (0054,0220) 1 Sequence that describes the view of the patient anatomy in this image. Only a single Item shall be included in this sequence.
>Include ‘Code Sequence Macro’ Table 8.8-1. Defined CID 4014.
>View Modifier Code Sequence (0054,0222) 2 Sequence that provides modifiers for the view of the patient anatomy. Zero or more Items shall be included in this sequence.
>>Include ‘Code Sequence Macro’ Table 8.8-1. Defined CID 4015.
Breast Implant Present (0028,1300) 1C Whether or not the imaged breast contains a breast implant regardless 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 Modifier Code Sequence (0054,0222) Item of value (R-102D6, SRT, “Magnification”) or (R-102D7, SRT, “Spot Compression”).
Partial View Code Sequence (0028,1352) 1C Sequence that describes the portion or section of the breast captured in a partial view image. One or two Items shall be included in this sequence. See C.8.11.7.1.3. Required if Partial View (0028,1350) is present with a value of YES.
>Include ‘Code Sequence Macro’ (Table 8.8-1). Defined CID 4005.