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CP-1475 - Add patient defined term for Ultrasound Acquisition Geometry
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Status
Final Text
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Date of Last Update
2015/11/10
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Person Assigned
David Clunie
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mailto:[email protected]
Submitter Name
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David Clunie
mailto:[email protected]
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Submission Date
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Correction Number CP-1475
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Log Summary: Add patient defined term for Ultrasound Acquisition Geometry
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Name of Standard
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PS3.3 2015c
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Rationale for Correction:
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The Enhanced US Volume object added an Ultrasound Frame Of Reference Module with a descriptive term describing the characteristic
of the ultrasound acquisition geometry.
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It is useful to be able to identify when the geometry is patient relative, to signal that the geometry is the same as the patient-relative
coordinate system.
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Correction Wording:
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2015/02/27
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CP-1475 - Add patient defined term for Ultrasound Acquisition Geometry
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Amend DICOM PS3.3 as follows (changes to existing text are bold and underlined for additions and struckthrough for removals):
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A.59.4 Enhanced US Volume Functional Group Macros
Table A.59-2. Enhanced US Volume Functional Group Macros
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Functional Group Macro
Section
Usage
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Plane Position (Patient)
C.7.6.16.2.3
UC - Required if Ultrasound Acquisition Geometry (0020,9307)
has a value of PATIENT. May be present otherwise. See
Section A.59.4.1.2.
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Plane Orientation (Patient)
C.7.6.16.2.4
UC - Required if Ultrasound Acquisition Geometry (0020,9307)
has a value of PATIENT. May be present otherwise. See
Section A.59.4.1.2.
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Plane Position (Volume)
C.7.6.16.2.21
M - May not be used as a Shared Functional Group. See
Section A.59.4.1.2.
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Plane Orientation (Volume)
C.7.6.16.2.22
M - May not be used as a Per-Frame Functional Group. See
Section A.59.4.1.2.
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A.59.4.1 Enhanced US Volume Functional Group Macros Content Constraints
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A.59.4.1.2 Plane Position (Volume) and Plane Orientation (Volume) Macros
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Image Position (Volume) (0020,9301) first value (X) shall be zero and second value (Y) shall be zero. Image Orientation (Volume)
(0020,9302) values shall be 1\0\0\0\1\0. This ensures that the origins of each frame lies on the Volume Frame of Reference ZV axis,
the rows of each frame are parallel to the Volume Frame of Reference XV axis, and the columns of each frame are parallel to the
Volume Frame of Reference YV axis.
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Adjacent planes in the volume shall be equally spaced in the Z direction.
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Note
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1.
More than one frame may be encoded for the same plane, for example, with a different temporal or cardiac cycle position.
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2.
Frames with the same value of Image Position (Volume) (0020,9301) will also have the same second value of Dimension
Index Value (the spatial position Dimension); See ???.
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3.
When Ultrasound Acquisition Geometry (0020,9307) has a value of PATIENT, the Plane Position (Patient) and
Plane Orientation (Patient) functional group macros will be present. They may contain attributes with identical
values to the corresponding attributes in the Plane Position (Volume) and Plane Orientation (Volume) functional
group macros if the frames are transverse and the origin of the Patient Coordinate System and the volume coincide (i.e., to remain compliant with the first paragraph of this section, which constrains the origin and orientation of the Volume Frame of Reference.
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C.8.24.2 Ultrasound Frame of Reference Module
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Table C.8.24.2-1 specifies the attributes of the Ultrasound Frame Of Reference Module. See ???.
Table C.8.24.2-1. Ultrasound Frame of Reference Module Attributes
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Attribute Name
Volume Frame of
Reference UID
Tag
Type
(0020,9312)
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Attribute Description
Uniquely identifies this Volume Frame of Reference.
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CP-1475 - Add patient defined term for Ultrasound Acquisition Geometry
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Attribute Name
Tag
Type
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Ultrasound Acquisition
Geometry
(0020,9307)
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Attribute Description
Characteristic of the ultrasound acquisition geometry.
Defined Terms:
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APEX
PATIENT
there exists an apex of the scan lines from which the volume data was
acquired.
the ultrasound acquisition geometry is patient relative
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Note
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When the value is PATIENT, the Plane Position (Patient) and Plane
Orientation (Patient) functional group macros will be present, and may
or may not contain attributes with identical values to the corresponding
attributes in the Plane Position (Volume) and Plane Orientation
(Volume) functional group macros; see Section A.59.4.1.2.
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Apex Position
(0020,9308)
1C
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Position of the apex (or phase center) of the acquisition geometry, encoded as xA,
yA, and zA in mm units in the Volume Frame of Reference. The apex (xA, yA, zA) may
be located in the volume or exterior to it.
Required if value of Ultrasound Acquisition Geometry (0020,9307) is APEX.
Volume to Transducer
Relationship
(0020,930B)
1C
Relationship between the transducer and the acquired volume.
Enumerated Values:
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FIXED
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Required if the transducer position and/or orientation relative to the volume is not
constant. May be present otherwise.
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The transducer position and orientation relative to the volume
is constant and specified by Volume to Transducer Mapping
Matrix (0020,9309).
POSITION_VAR
The transducer position relative to the volume varies during
acquisition and the position specified by Volume to Transducer
Mapping Matrix (0020,9309) is a nominal value. The
transducer orientation relative to the volume is constant and
specified by Volume to Transducer Mapping Matrix
(0020,9309).
ORIENTATION_VAR The transducer orientation relative to the volume varies during
acquisition and the orientation specified by Volume to
Transducer Mapping Matrix (0020,9309) is a nominal value.
The transducer position relative to the volume is constant and
specified by Volume to Transducer Mapping Matrix
(0020,9309).
VARIABLE
The transducer position and orientation relative to the volume
varies during acquisition and the position and orientation
specified by Volume to Transducer Mapping Matrix
(0020,9309) are nominal.
Volume to Transducer
Mapping Matrix
(0020,9309)
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A 4x4 rigid transformation matrix that maps the Volume Frame of Reference
homogeneous coordinate system (XV, YV, ZV) to the Transducer Frame of Reference
homogeneous coordinate system (XX,YX, ZX). Matrix elements shall be listed in
row-major order. See ??? for details.
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CP-1475 - Add patient defined term for Ultrasound Acquisition Geometry
Attribute Name
Patient Frame of
Reference Source
Tag
Type
(0020,930C)
1C
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Attribute Description
Indicates how the supplied Image Position (Patient) (0020,0032) and Image
Orientation (Patient) (0020,0037) values are obtained.
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Enumerated Values:
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TABLE
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Required if either Image Position (Patient) (0020,0032) or Image Orientation (Patient)
(0020,0037) is present.
A positioning device, such as a gantry, was used to generate
these values.
ESTIMATED
Estimated patient position / orientation (e.g., estimated by the
user), or if reliable information is not available.
REGISTRATION Acquisition has been spatially registered to a prior image set.
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Table Frame of
Reference UID
(0020,9313)
1C
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Volume to Table
Mapping Matrix
(0020,930A)
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Uniquely identifies this Table Frame of Reference.
Required if Patient Frame of Reference Source (0020,930C) is TABLE.
A 4x4 rigid transformation matrix that maps the Volume Frame of Reference
homogeneous coordinate system (XV,YV, ZV) to the Table Frame of Reference
homogeneous coordinate system (XT,YT, ZT). Matrix elements shall be listed in
row-major order. See ??? for details.
Required if Patient Frame of Reference Source (0020,930C) is TABLE.
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