Материал: part03

C.11.23.5 Cropping​

Cropping is an operation in which a portion of the source volume is ignored during subsequent volumetric processing. Cropping shall​ be specified as follows:​

•​If Global Crop (0070,120B) is YES, Global Crop Specification Index (0070,120C) specifies cropping which shall be applied to every​ input of the Volumetric Presentation State.​

•​IfCrop(0070,1204)isYESforaparticularinput,CroppingSpecificationIndex(0070,1205)specifiescroppingwhichshallbeapplied​ to that input of the Volumetric Presentation State.​

Each value in Global Crop Specification Index (0070,120C) and Cropping Specification Index (0070,1205) shall match a Cropping​ Specification Number (0070,1302) in Volume Cropping Sequence (0070,1301).​

C.11.24 Volume Cropping Module​

Table C.11.24-1 contains the Attributes of the Volume Cropping Module. This Module limits the spatial extent of inputs in Volumetric​ Presentation State Input Sequence (0070,1201) that are used.​

Table C.11.24-1. Volume Cropping Module Attributes​

BOUNDING_BOX​

OBLIQUE_PLANES​

INCLUDE_SEG​

EXCLUDE_SEG​

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Each referenced Segmentation Instance shall have Segmentation Type​ (0062,0001) value of BINARY and shall share a Frame of Reference with​ one or more Input Volumes.​

One or more Items shall be included in this Sequence.​

Required if Volume Cropping Method (0070,1302) has a value of​

INCLUDE_SEG or EXCLUDE_SEG.​

Note​

SurfaceSegmentationinstancesarenotreferencedbythiselement.​

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

C.11.24.1 Volume Cropping​

Cropping is an operation in which a portion of the source volume is ignored during subsequent volumetric processing, using one of​ the methods specified by Volume Cropping Method (0070,1302) :​

BOUNDING_BOX​ The source volume data within a bounding box are included in the View​

OBLIQUE_PLANES​The source volume data within a closed surface described by a set of arbitrarily-oriented planes are included in​ the View​

INCLUDE_SEG​ SourcevolumedatashouldbeincludedintheViewifandonlyifthedataiswithinanyofthereferencedSegments​ that share its value of Input Sequence Position Index (0070,1203) (if specified)​

EXCLUDE_SEG​ Source volume data should be included in the View if and only if the data is not within any of the referenced​ Segments that share its value of Input Sequence Position Index (0070,1203) (if specified)​

C.11.25 Presentation View Description Module​

Table C.11.25-1 contains Attributes that describe the view of this presentation in anatomical terms.​

Note: For example, a Volumetric Presentation State derived from a whole-body CT source volume could be restricted to the left leg.​

Table C.11.25-1. Presentation View Description Module Attributes​

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Enumerated Values:​

R​right​

L​left​

U​unpaired​

B​both left and right​

Shallbeconsistentwithanylateralityinformationcontained​ in Primary Anatomic Structure Modifier Sequence​ (0008,2230), if present.​

C.11.26 Multi-Planar Reconstruction Geometry Module​

Table C.11.26-1 contains Attributes that describe the geometry of this Multi-Planar Reconstruction view.​

Table C.11.26-1. Multi-Planar Reconstruction Geometry Module Attributes​

the leftmost column of the MPR view.​ See Section C.11.26.1.​

Required if Multi Planar Reconstruction Style (0070,1501) is PLANAR.​

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Coordinate System of the upper left hand corner of the MPR View​ rectangle, in mm.​

See Section C.11.26.1.1.​

Required if Multi-Planar Reconstruction Style (0070,1501) has a value​ of PLANAR.​

C.11.26.1 Multi-Planar Reconstruction Styles​

A Multi-Planar Reconstruction (or MPR) is one of the styles described in this section.​

C.11.26.1.1 Planar Style​

Figure C.11.26-1. Volume Rendering with visualization of MPR plane orientation and resulting PLANAR​ MPR rendering​

A PLANAR MPR is a thin slice or thick slab of the input volume defined by a geometric plane as illustrated by Figure C.11.26-1. Fig-​ ure C.11.26-2 and Figure C.11.26-3 depict the relationships between MPR Geometry Module Attributes and Thin and Slab MPR​ views, respectively.​

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MPR View Width Direction (0070,x507)

MPR View Width (0070,x508)

MPR Top Left Hand Corner (0070,x505)

MPR View Height (0070,x512)

MPR View Height Direction (0070,x511)

Figure C.11.26-2. Planar MPR THIN Geometry​

The following Attributes describe the PLANAR MPR:​

•​MPRViewWidthDirection(0070,1507)andMPRViewHeightDirection(0070,1511)specifytheorientationoftheMPRviewrectangle​ in the Volumetric Presentation State Reference Coordinate System​

•​MPR View Width (0070,1508) and MPR View Height (0070,1512) specify the size of the MPR view rectangle in the Volumetric​ Presentation State Reference Coordinate System​

•​MPR Top Left Hand Corner (0070,1505) species the position of the upper-left corner of the MPR view rectangle in the Volumetric​ Presentation State Reference Coordinate System​

•​MPR Thickness Type (0070,1502) specifies whether the MPR is created by taking a single sample for each pixel (THIN) or by​ creating an orthographic rendering of a slab volume with a defined thickness using the method defined by Rendering Method​ (0070,120D) (SLAB).Ifthespecified thickness is belowanapplication-determinedlimitthe resultingview shallbe treated as aTHIN​ MPR.​

•​MPR Slab Thickness (0070,1503) specifies the thickness of the slab if MPR Thickness Type (0070,1502) is SLAB. The slab volume​ is positioned such that the MPR view defined by MPR View Width Direction (0070,1507), MPR View Width (0070,1508), MPR View​ Height Direction (0070,1511), MPR View Height (0070,1512), and MPR Top Left Hand Corner (0070,1505) is at the midpoint of​ the slab thickness.​

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