Материал: part03

>IncludeTableC.11.11-1b“PresentationStateRelationshipMacro​ Attributes”​

>Include Table C.11-1b “Modality LUT Macro Attributes” if a​ Modality LUT is to be applied to referenced image(s).​

VOI LUT or Window Center and Width applies.​

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

Required if the VOI LUT transformation in this Item does notapply​ to all the images and frames in the enclosing Item of Blending​ Sequence (0070,0402).​

>Include Table C.17-3 “Hierarchical SOP Instance Reference​

Macro Attributes”​

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C.11.14.1 Presentation State Blending Module Attributes​

C.11.14.1.1 Blending Sequence​

Blending Sequence (0070,0402) is used to identify two sets of images, one to be superimposed upon the other.​

Thesetsofimagesandanysubsetoftheframesthereininthecaseofmulti-frameimagesareidentifiedbyStudy,Series,SOPInstance​ and Frame Number. In the case of a Segmentation image, the subset of segments is identified by the Attribute Referenced Segment​ Number (0062,000B) in the Referenced Image Sequence (0008,1140) invoked in the Presentation State Relationship Macro.​

This Module specifies no explicit relationship (such as pairing or ordering) between the sets of images and frames defined in the first​ Item for the underlying images, and the second Item for the superimposed images. This Module does not define how the images are​ spatially related, and what re-sampling, if any, needs to be performed before the images are blended for rendering.​

Note​

1.​TheimagesinthetwosetsmaysharethesameFrameofReference,inwhichcasetherenderingapplicationcanspatially​ relate the two sets of images based on their Image Position (Patient) (0020,0032) and Image Orientation (Patient)​ (0020,0037) Attributes.​

Alternatively, a Spatial Registration SOP Instance may exist that relates either two different Frames of Reference, or​ two sets of images identified by UID and frame.​

Whilstthetwosetsofimagesmayalreadybespatiallyco-registeredandorientedinthesameplane,orevenbesampled​ at the same in-plane and between-plane resolution, this will frequently not be the case.​

See PS3.4 for behavioral requirements that apply to Storage SOP Classes using this Module.​

2.​The underlying image for a superimposed Segmentation image need not be the source image for the segmentation.​

C.11.15 ICC Profile Module​

Table C.11.15-1 contains Attributes that identify and describe an ICC Profile.​

Table C.11.15-1. ICC Profile Module Attributes​

See Section C.11.15.1.2.​

C.11.15.1 Attribute Descriptions​

C.11.15.1.1 ICC Profile​

ICC Profile (0028,2000) encodes an ICC Input Device Profile that encodes the transformation of device-dependent color stored pixel​ values into PCS-Values.​

Note​

1.​Only Input Device profiles are encoded, since display and output device profiles are not interchanged in DICOM, though​ they may be used internally within display and output devices, for example when they are calibrated.​

2.​Since the version of the ICC Profile is encoded within the profile itself, no additional version information is encoded in​ the ICC Profile Module.​

The following constraints on the encoding of the ICC Profile shall be observed:​

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•​The profile shall be of the Input Device class, i.e., header bytes 12 through15, Profile Device/Class Signature, shall be "scnr"​

•​The color space of the input shall be RGB, i.e., header bytes 16 through 19, Color Space Signature, shall be "RGB", regardless of​ the Photometric Interpretation of the image pixel data prior to decompression​

•​PCS shall be CIELab or CIEXYZ, i.e., header bytes 20 through 23, Profile Connection Space, shall be either "Lab" or "XYZ".​

Note​

1.​InthecaseofaPCSofCIELab,theprofilewillcontainanN-componentLUT-basedAtoB0Tag,sincethree-component​ matrixbasedtransformationsareonlypossiblewithaPCSofCIEXYZ.Athree-componentmatrixbasedtransformation​ might be used to define a well-known rather than device-specific profile for such spaces as sRGB.​

2.​Selection of a PCS of CIELab or CIEXYZ within the ICC profile does not impact the DICOM encoding, since all color​ management systems support both.​

The following constraints on the encoding of the ICC Profile are recommended:​

•​The Rendering Intent should be Perceptual.​

Note​

1.​The rendering intent specifies how rendering will take place when the ICC Input Profile is linked with another Profile​ for the purpose of display.​

2.​A perceptual rendering intent implies that AtoB0Tag and BtoA0Tag tags will be present in the profile. The AtoB0Tag​ allows mapping from the input values to the PCS. The BtoA0Tag allows mapping from the PCS to the input values,​ though this is not required for the color rendering pipeline defined in PS3.4.​

•​All LUTs should be represented as 16 bit values, using tag type lut16Type, for greater precision.​

•​The chromaticAdaptationTag should be set if the actual illumination source is not D50.​

Note​

See the discussion of white point in PS3.4.​

C.11.15.1.2 Color Space​

The Color Space Attribute provides a label that identifies the color space by name, when the ICC Profile (0028, 2000) (if present)​ describes a well-known color space.​

Defined Terms:​

SRGB​ ICC Profile (0028,2000) defines sRGB color space [IEC 61966-2.1]​

ADOBERGB​ICC Profile (0028,2000) defines Adobe RGB color space [Adobe RGB]​

ROMMRGB​ICC Profile (0028,2000) defines ROMM RGB color space [ISO 22028-2]​

C.11.16 Structured Display Module​

Table C.11.16-1 describes the Attributes of the Structured Display Module.​

Table C.11.16-1. Structured Display Module Attributes​

Attribute Name​ Tag​ Type​ Attribute Description​

Include Table 10-12 “Content Identification Macro Attributes”​

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C.11.17 Structured Display Image Box Module​

Table C.11.17-1 describes the Attributes of the Structured Display Image Box Module.​

Table C.11.17-1. Structured Display Image Box Module Attributes​

Required if the value of Image Box Layout Type (0072,0304) is TILED.​

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