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.