Материал: part03

Presentation States in such a collection may be used in an animation. In this form of animation, Presentation States in the set are​ applied in sequential order to produce a moving view. Typically, the same input(s) are used in each Presentation State of the set.​ See the PRESENTATION_SEQ animation style in Section C.11.29.​

Note​

Examples include:​

•​animation of a sequence of MPRs depicting the left ventricle of the heart at each point in a cardiac cycle with slightly dif-​ ferent geometries​

•​animation of a sequence of views throughout the cardiac cycle in which a stent appears stationary in the middle of the​ view​

•​a sequence of parallel slices of an anatomical structure (that aren't necessarily going to be animated)​

Presentation States in such a collection that are not used in an animationleave the style ofpresentation tothediscretion ofthedisplay​ application, such as by display of all related presentations in a "light-box" format or in a single display frame with manual scrolling of​ the views.​

All Presentation States with the same value of Presentation Sequence Collection UID (0070,1102) shall share the same Volumetric​ Presentation State Reference Coordinate System.​

C.11.23 Volumetric Presentation State Relationship Module​

Table C.11.23-1 contains Attributes that describe sets of inputs to a Presentation State and how each input is to be displayed in the​ presentation.​

Table C.11.23-1. Volumetric Presentation State Relationship Module Attributes​

See Section C.11.23.1 for constraints on objects referenced by this​

Sequence.​

RequiredifPresentationInputType(0070,1202)hasavalueofVOLUME.​

>>Include Table 10-3 “Image SOP Instance Reference​ Macro Attributes”​

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Only one Item shall be included in this Sequence. All images referenced​ by the Referenced Image Sequence (0008,1140) of this Item of the​ Volumetric Presentation State Input Sequence (0070,1201) shall be​ referenced by the Spatial Registration instance.​

See Section C.11.23.3.​

RequirediftheFrameofReferenceUID(0020,0052)valueoftheImages​ referencedbytheReferencedImageSequence(0008,1140)ofthisItem​ of the Volumetric Presentation State Input Sequence (0070,1201) does​ not match the Frame of Reference UID (0020,0052) value of this​ Presentation State instance. May be present otherwise.​

>>Include Table 10-11 “SOP Instance Reference Macro​ Attributes”​

Note​

For example, CT and PET inputs.​

Distinctvaluesshallbeordinalnumbersstartingfrom1andmonotonically​ increasing by 1 within the Volumetric Presentation State instance.​

See Section C.11.23.2.​

Required if Presentation Animation Style (0070,1A01) is present with a​ value of INPUT_SEQ.​

Note​

The inputs of the sequence are typically temporally related.​

>Include Table C.11-2b “VOI LUT Macro Attributes”​

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Volume Cropping Method (0070,1302) shall include only​

BOUNDING_BOX or OBLIQUE_PLANE values.​

Required if Global Crop (0070,120B) has a value of YES.​

C.11.23.1 Presentation Input Type Volume Input Requirements​

SOP instances with Presentation Input Type (0070,1202) value of VOLUME referenced by one Item in Volumetric Presentation Input​ SetSequence(0070,1209)areacollectionofimageinstancesorframeswithinimageinstancesthatconformstothefollowingrequire-​ ments:​

•​All image instances shall have the same values of​

•​SOP Class UID(0008,0016)​

•​Series Instance UID (0020,000E)​

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•​Frame of Reference UID (0020,0052) or Volume Frame of Reference UID (0020,9312)​

•​All instances or frames shall have the following Attributes of the same value:​

•​Samples per Pixel (0028,0002)​

•​Photometric Interpretation (0028,0004)​

•​Rows (0028,0010)​

•​Columns (0028,0011)​

•​Bits Allocated (0028,0100)​

•​Bits Stored (0028,0101)​

•​High Bit (0028,0102)​

•​Pixel Representation (0028,0103)​

•​Pixel Spacing (0028,0030)​

•​Photometric Interpretation (0028,0004) shall be MONOCHROME2​

•​Pixel Data (7FE0,0010) is present.​

•​All Instances or Frames have orthogonal row and column vectors​

•​A VOLUME input shall have more than one frame.​

•​No two Instances or Frames share the same Image Position (Patient) (0020,0032) or Image Position (Volume) (0020,9301). Two​ Instances or Frames should be treated as sharing the same position if the differences between their positions is sufficiently small.​

•​AllInstancesorFramesshallbeparallel.InstancesorFramesmaybetreatedasparallelifthedifferencesintheirImageOrientation​ (Patient) (0020,0037) or Image Orientation (Volume) (0020,9302) are sufficiently small.​

•​AllInstancesorFramesshallbesufficientlyalignedsuchthatasingleraycanpassthroughtheupper-lefthandcornerofallInstances​ or Frames. That ray shall be orthogonal to the plane of the frame (i.e., normal to the input frames). Instances or Frames may be​ treated as aligned if the degree of misalignment between frames or relative to the normal is sufficiently small.​

•​A VOLUME input may have:​

•​Variable spacing between slices​

•​Overlapping slice thicknesses​

•​Gaps between slice thicknesses​

Note​

The degree of tolerance for discrepancies in position and orientation may vary between applications.​

C.11.23.2 Input Sequence Position Index​

A sequence of inputs may be used in an animation. In this form of animation, the Presentation State is applied to each input in a se-​ quence of inputs to produce a moving view. The inputs belonging to the input sequence are identified by the inclusion of an Input​ Sequence Position Index (0070,1203) value for each included input. See the INPUT_SEQ animation style in Section C.11.29.​

Note​

Examples include:​

•​a sequence of cardiac volume acquisitions acquired through a heart cycle​

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•​a sequence of volume acquisitions during multiple phases of passage of a contrast agent​

There is another animation method "Presentation Sequence Animation" that may be used. See Section C.11.22.2 “Presentation Se-​ quence Collection UID”.​

C.11.23.3 Volumetric Presentation State Reference Coordinate System​

TheVolumetricPresentationStateReferenceCoordinateSystem(VPS-RCS)isidentifiedbytheSectionC.7.4.1“FrameofReference​

Module”.​

All SOP Instances specified in the Volumetric Presentation State Relationship Module shall be implicitly or explicitly registered to the​ Volumetric Presentation State Reference Coordinate System. Registration is implicit if the Frame of Reference of a particular input​ SOP Instance is chosen as the VPS-RCS. Explicit registration is required if the Frame of Reference UID value of one or more input​ SOP Instances are different from the Frame of Reference UID value of the Presentation State.​

Note​

1.​If the Presentation State has a single source object, it is recommended that the Presentation State use the same Frame​ of Reference UID as the source object and not require explicit Spatial Registration.​

2.​It should be recognized that not all objects with the same Frame of Reference UID values are precisely registered to​ the Frame of Reference implied by that UID (for example, successive scans of a patient by a CT/PET scanner where​ thepatientmayhavemovedsomewhatbetweenscans).Insuchacase,explicitregistrationmaybenecessarytoachieve​ the precision of registration required by the clinical application.​

C.11.23.4 Volumetric Presentation Input Set UID​

Each set of instances and/or frames used as input to the Volumetric Presentation State specified by one Item in Volumetric Present-​ ation State Input Set Sequence (0070,120A) is identified by Volumetric Presentation Input Set UID (0070,1209). The Volumetric​ Presentation State Input Sequence (0070,1201) references Items in Volumetric Presentation Input Set Sequence (0070,120A) by​ their UID and specifies the particular processing to be performed prior to compositing with other inputs to build the final presentation​ view.​

Figure C.11.23.4-1. Role of Volumetric Presentation Input Set Sequence (0070,120A)​

Volumetric Presentation Input Set UID (0070,1209) may be shared among multiple Volumetric Presentation State instances using​ the same input data.​

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