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(0008,0023) Content Date1Date
(0008,0033) Content Time1Time
(0020,0013) Instance Number1Integer String
(0020,0242) SOP Instance UID of Concatenation Source1CUnique Identifier
(0020,9161) Concatenation UID1CUnique Identifier
(0020,9162) In-concatenation Number1CUnsigned Short
(0020,9163) In-concatenation Total Number3Unsigned Short
(0020,9228) Concatenation Frame Offset Number1CUnsigned Long
(0022,0028) Stereo Pairs Present3Code String
(0028,0008) Number of Frames1Integer String
(0028,6010) Representative Frame Number3Unsigned Short
(5200,9229) Shared Functional Groups Sequence1Sequence
(0008,1140) Referenced Image Sequence2Sequence
(0008,9124) Derivation Image Sequence2Sequence
(0018,1006) Grid ID3Long String
(0018,7040) Grid Absorbing Material3Long Text
(0018,7041) Grid Spacing Material3Long Text
(0018,7042) Grid Thickness3Decimal String
(0018,7044) Grid Pitch3Decimal String
(0018,7046) Grid Aspect Ratio3Integer String
(0018,7048) Grid Period3Decimal String
(0018,704C) Grid Focal Distance3Decimal String
(0018,9341) Contrast/Bolus Usage Sequence1Sequence
(0018,9405) Positioner Position Sequence1Sequence
(0018,9407) Collimator Shape Sequence1Sequence
(0018,9412) XA/XRF Frame Characteristics Sequence1Sequence
(0018,9417) Frame Acquisition Sequence1Sequence
(0018,9432) Field of View Sequence1Sequence
(0018,9451) Frame Detector Parameters Sequence1Sequence
(0018,9455) Calibration Sequence1Sequence
(0018,9462) Isocenter Reference System Sequence1Sequence
(0018,9543) X-Ray Source Isocenter Primary Angle1Double
(0018,9544) X-Ray Source Isocenter Secondary Angle1Double
(0018,9545) Breast Support Isocenter Primary Angle1Double
(0018,9546) Breast Support Isocenter Secondary Angle1Double
(0018,9547) Breast Support X Position to Isocenter1CDouble
(0018,9548) Breast Support Y Position to Isocenter1CDouble
(0018,9549) Breast Support Z Position to Isocenter1CDouble
(0018,9550) Detector Isocenter Primary Angle1Double
(0018,9551) Detector Isocenter Secondary Angle1Double
(0018,9552) Detector X Position to Isocenter1CDouble
(0018,9553) Detector Y Position to Isocenter1CDouble
(0018,9554) Detector Z Position to Isocenter1CDouble
(0018,9557) Detector Active Area TLHC Position1CDouble
(0018,9558) Detector Active Area Orientation1CDouble
(0018,9472) Frame Display Shutter Sequence1Sequence
(0018,9476) X-Ray Geometry Sequence1Sequence
(0018,9477) Irradiation Event Identification Sequence1Sequence
(0018,9541) Detector Position Sequence1Sequence
(0018,9542) X-Ray Acquisition Dose Sequence1Sequence
(0018,9555) X-Ray Grid Sequence1Sequence
(0018,9556) X-Ray Filter Sequence1Sequence
(0020,9071) Frame Anatomy Sequence1Sequence
(0020,9111) Frame Content Sequence1Sequence
(0028,9132) Frame VOI LUT Sequence1Sequence
(0028,9145) Pixel Value Transformation Sequence1Sequence
(0028,9443) Frame Pixel Data Properties Sequence1Sequence
(5200,9230) Per-frame Functional Groups Sequence1CSequence
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Built with by Innolitics, a team of medical imaging software developers.

Data synced with official DICOM standard on 12 May 2020. The DICOM Standard is under continuous maintenance, and the current official version is available at //dicom.nema.org/. DICOM Parts 3, 4, and 6, © NEMA. Please note that the most recent PDF version of the standard is the official reference, and should checked when making technical decisions.

Breast Support X Position to Isocenter Attribute

Tag(0018,9547)
TypeConditionally Required (1C)
KeywordBreastSupportXPositionToIsocenter
Value Multiplicity1
Value RepresentationDouble (FD)

X position of the Breast Support Reference Point with respect to the Isocenter (mm).

See C.8.31.6.1.3 for further explanation.

Required if Presentation Intent Type (0008.0068) = FOR PROCESSING. May be present otherwise.

Note

Part of the Breast X-Ray Isocenter Reference System Functional Group Macro with usage: M

C.8.31.6.1.3

C.8.31.6.1.3 Breast Support Coordinate System

The Breast Support (see Figure C.8.31.6-6) is the housing over the detector onto which the breast is placed before imaging. For the purpose of this description, Breast Support top surface refers to the patient contact surface of the Breast Support, closest to the X-Ray source.

Figure C.8.31.6-6. Breast Support Orientation


The Breast Support coordinate system (Ob, Xb, Yb, Zb) is defined as follows (see Figure C.8.31.6-7):

  • Origin Ob, the so-called Breast Support Reference Point, is an arbitary point, as defined by the equipment manufacturer, on the axis of the center of rotation of the Breast Support.

  • Xb axis lies parallel to the Breast Support top surface, passes through Ob, and is parallel to X when the Breast Support top surface is normal to gravity. The +Xb direction is toward BREAST SUPPORT RIGHT.

  • Yb axis lies parallel to the Breast Support top surface, passes through Ob, and is perpendicular to the Xb axis. The +Yb direction is toward BREAST SUPPORT ANTERIOR.

  • Zb axis is normal to the Breast Support top surface and passes through Ob. The +Zb direction is toward BREAST SUPPORT HEAD.

The Breast Support coordinate system (Ob, Xb, Yb, Zb) is characterized, with respect to the Isocenter coordinate system (O, X, Y, Z), by two rotations that describe the Breast Support tilt and a 3D translation (see Figure C.8.31.6-7). It is the most common convention in breast projection X-Ray system design to have the Breast Support rotate identically and in synchronization with the system C-arm (they are most often rigidly integrated):

Breast Support Isocenter Primary Angle (0018,9545) (so-called Ab1) is defined as the angle between the YZ plane and the YZb plane. The angle is positive when the Breast Support Right end of the Breast Support is lower than the Breast Support Left end of the Breast Support, and is 0° when the Breast Support surface is normal to the +Z direction. In digital breast tomosynthesis, because the X-Ray source moves independently of the Breast Support, the Breast Support Isocenter Primary Angle is the principal place where the user's perception of the C-arm angle is encoded.

Breast Support Isocenter Secondary Angle (0018,9546) (so-called Ab2) is defined as the angle between the XY plane and the XYb plane. The angle is positive when the Breast Support Anterior side of the Breast Support is lower than the Breast Support Posterior end of the Breast Support, and is 0° when the Breast Support surface is normal to the +Z axis. In most breast projection X-Ray imaging equipment the value of Ab2 is 0°.

Figure C.8.31.6-7. Breast Support Angles with respect to the Isocenter Reference System


Breast Support X Position to Isocenter (0018,9547) (so-called BX) is defined as the translation of the Breast Support Reference Point Ob with respect to the Isocenter coordinate system in the +X axis direction. Breast support translation toward +X is positive.

Breast Support Y Position to Isocenter (0018,9548) (so-called BY) is defined as the translation of the Breast Support Reference Point Ob with respect to the Isocenter coordinate system in the +Y axis direction. Breast support translation toward +Y is positive.

Breast Support Z Position to Isocenter (0018,9459) (so-called BZ) is defined as the translation of the Breast Support Reference Point Ob with respect to the Isocenter coordinate system in the +Z axis direction. Breast support translation toward +Z is positive.

Note

A translation of (BX, BY, BZ) = (0, 0, 0) means that the Breast Support Reference Point Ob is at the System Isocenter.

Figure C.8.31.6-8. Breast Support Translation with respect to the Isocenter Reference System