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Graphic LayerCModule - Presentation State
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XA/XRF Presentation State MaskCModule - Presentation State
(0028,6100) Mask Subtraction Sequence1Sequence
(0008,1140) Referenced Image Sequence1CSequence
(0028,6101) Mask Operation1Code String
(0028,6102) Applicable Frame Range1CUnsigned Short
(0028,6110) Mask Frame Numbers1CUnsigned Short
(0028,6112) Contrast Frame Averaging3Unsigned Short
(0028,6120) TID Offset2CSigned Short
(0028,9422) Pixel Intensity Relationship LUT Sequence1CSequence
(0028,9501) Pixel Shift Sequence1Sequence
(0028,9502) Region Pixel Shift Sequence1Sequence
(0028,6114) Mask Sub-pixel Shift1Single
(0028,9503) Vertices of the Region1CSigned Short
(0028,9506) Pixel Shift Frame Range1Unsigned Short
XA/XRF Presentation State ShutterCModule - Presentation State
XA/XRF Presentation State PresentationCModule - Presentation State
Softcopy Presentation LUTMModule - Presentation State
SpecimenUModule - Presentation State
SOP CommonMModule - Presentation State
Advanced Blending Presentation StateCIOD
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Basic Voice Audio WaveformCIOD
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Generic Implant TemplateCIOD
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RT Beams Delivery InstructionCIOD
Ophthalmic Visual Field Static Perimetry MeasurementsCIOD
Intravascular Optical Coherence Tomography ImageCIOD
Ophthalmic Thickness MapCIOD
Surface Scan MeshCIOD
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Legacy Converted Enhanced CT ImageCIOD
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Corneal Topography MapCIOD
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Parametric MapCIOD
Wide Field Ophthalmic Photography Stereographic Projection ImageCIOD
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Tractography ResultsCIOD
RT Brachy Application Setup Delivery InstructionCIOD
Planar MPR Volumetric Presentation StateCIOD
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CT Performed Procedure ProtocolCIOD
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RT Physician IntentCIOD
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Basic DirectoryCIOD

Built with by Innolitics, a team of medical imaging software developers.

Data synced with official DICOM standard on 18 April 2024. The DICOM Standard is under continuous maintenance, and the current official version is available at http://www.dicomstandard.org/current/. 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.

Region Pixel Shift Sequence Attribute

Tag(0028,9502)
TypeRequired (1)
KeywordRegionPixelShiftSequence
Value Multiplicity1
Value RepresentationSequence (SQ)

Sequence containing the pixel shifts for this frame(s).

Only one sub region of this frame(s) shall be specified when the pixel shift is applicable for the full size or a single region of the frame(s).

More than one sub region of this frame(s) may be specified when pixel shift is different in different regions.

The order of Items in this Sequence is significant, see Section C.11.19.1.2.

One or more Items shall be included in this Sequence.

Section C.11.19.1.2

C.11.19.1.2 Vertices of the Region

Each Item of the Region Pixel Shift Sequence (0028,9502) specifies both a region of the contrast frame and a mask pixel shift to be applied during the subtraction of that region.

When the Region Pixel Shift Sequence (0028,9502) contains more than one Item, each region of the contrast frame is subtracted by applying the corresponding pixel shift specified in that Item.

When an Item of the Sequence does not contain the Attribute Vertices of the Region (0028,9503), the applicable region for that Item is the whole contrast frame.

The union of all the regions defined in the Region Pixel Shift Sequence (0028,9502) does not cover necessarily the whole contrast frame, in which case the pixels outside the union of all the regions shall be subtracted with no pixel shift.

If a set of pixels of the contrast frame is contained in more than one region, the applicable pixel shift is the one of the last Item with the region that contains this set of pixels, as shown in Figure C.11.19-1.

Figure C.11.19-1. Applicable pixel shift in case of multiple pixel shift regions


Note

For example, the contrast frames 4 to 10 of a SOP Instance "A" are subtracted to the mask frame 1, the subtraction of the frames 4 to 7 being performed with three different values of mask pixel shift on overlapping rectangular regions: The (row,column) coordinates of the top-left and bottom-right vertices of the regions are 1: (1,1) to (30,60), 2: (10,40) to (50,120) and 3: (20,20) to (70,80). The mask pixel shift to be applied to the pixel (25,50) corresponds to the region 3 because this pixel is contained in the intersection of the three regions (see Figure C.11.19-2 and Figure C.11.19-3).

Figure C.11.19-2. Example of Contents of Mask Subtraction Sequence


Figure C.11.19-3. Example of three different pixel shift regions