DICOM PS3.3 2020c - Information Object Definitions

C.11.28 Volumetric Graphic Annotation Module (Current)
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### C.11.28 Volumetric Graphic Annotation Module

Table C.11.28-1 contains Attributes that specify graphic annotation placed in the Volumetric Presentation State Reference Coordinate System coordinate space.

### Note

This Module specifies literal text and/or graphic annotation only. Provision is made to reference external measurement Structured Report Instances to provide context for the annotation, if desired.

Table C.11.28-1. Volumetric Graphic Annotation Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Volumetric Annotation Sequence | (0070,1901) | 1C | Graphic annotations described by coordinates in the Volumetric Presentation State Reference Coordinate System. One or more Items shall be included in this Sequence. Required if Volumetric Presentation Input Annotation Sequence (0070,1905) is not present. May be present otherwise.
>Graphic Data | (0070,0022) | 1 | An ordered set of (x,y,z) triplets (in mm and may be negative) that define a region of interest in the Volumetric Presentation State Reference Coordinate System defined by Frame of Reference UID (0020,0052). See Section C.18.9.1.1.
>Graphic Type | (0070,0023) | 1 | See Section C.18.9.1.2 for Enumerated Values.
>Graphic Layer | (0070,0002) | 1 | The layer defined in the Section C.10.7 “Graphic Layer Module” in which the graphics or text is to be rendered.
>Annotation Clipping | (0070,1907) | 1 | Specifies whether the volumetric annotation should be displayed only when it intersects with the presentation view. Enumerated Values: YES NO See Section C.11.28.1.
>Text Object Sequence | (0070,0008) | 3 | Sequence that describes a text annotation. One Item shall be included in this Sequence.
>>Unformatted Text Value | (0070,0006) | 1 | Displayed text associated with the input Instance. See Section C.10.5.1.1.
>>Bounding Box Top Left Hand Corner | (0070,0010) | 3 | Recommended location of the Top Left Hand Corner (TLHC) of the bounding box in which Unformatted Text Value (0070,0006) is to be placed within a Volumetric Presentation View, specified as fractions of the view width and view height. Each value shall be within the range 0.0 to 1.0.
>>Bounding Box Bottom Right Hand Corner | (0070,0011) | 1C | Recommended location of the Bottom Right Hand Corner (BRHC) of the bounding box in which Unformatted Text Value (0070,0006) is to be placed within a Volumetric Presentation View, specified as fractions of the view width and view height. Each value shall be within the range 0.0 to 1.0. Required if Bounding Box Top Left Hand Corner (0070,0010) is present.
>>Bounding Box Text Horizontal Justification | (0070,0012) | 1C | Location of the Unformatted Test Value (0070,0006) relative to the vertical edges of the bounding box. Enumerated Values: LEFT Closest to the left edge RIGHT Closest to the right edge CENTER Centered Required if Bounding Box Top Left Hand Corner (0070,0010) is present.
>Referenced Structured Context Sequence | (0070,1903) | 3 | Reference to a node in a Structured Report Instance providing context for this annotation. Only one Item shall be present in this Sequence. See Section C.11.28.2.
>>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
>>Referenced Content Item | (0070,1904) | 1 | Reference to a Content Item in the referenced Structured Report specified as the Observation UID (0040,A171) of the Content Item.
Volumetric Presentation Input Annotation Sequence | (0070,1905) | 1C | Annotations of inputs in Volumetric Presentation State Input Sequence (0070,1201). One or more Items shall be included in this Sequence. Required if Volumetric Annotation Sequence (0070,1901) is not present. May be present otherwise.
> Volumetric Presentation Input Index | (0070,1804) | 1 | Value of Volumetric Presentation Input Number (0070,1207) for this input in the Volumetric Presentation State Input Sequence (0070,1201). ### Note The annotation is intended to refer to a cropped input volume.
>Graphic Layer | (0070,0002) | 1 | The layer defined in the Graphic Layer Module C.10.7 in which the graphic or text is to be rendered.
>Text Object Sequence | (0070,0008) | 1 | Sequence that describes a text annotation. One Item shall be included in this Sequence.
>>Unformatted Text Value | (0070,0006) | 1 | Displayed text associated with the input. See Section C.10.5.1.1.
>>Bounding Box Top Left Hand Corner | (0070,0010) | 3 | Recommended location of the Top Left Hand Corner (TLHC) of the bounding box in which Unformatted Text Value (0070,0006) is to be displayed, as fractions of the specified presentation view width and height. Each value shall be within the range 0.0 to 1.0. See Section C.10.5.1.1.
>>Bounding Box Bottom Right Hand Corner | (0070,0011) | 1C | Recommended location of the Bottom Right Hand Corner (BRHC) of the bounding box in which Unformatted Text Value (0070,0006) is to be displayed, as fractions of the specified presentation view width and height. Each value shall be within the range 0.0 to 1.0. See Section C.10.5.1.1. Required if Bounding Box Top Left Hand Corner (0070,0010) is present.
>>Bounding Box Text Horizontal Justification | (0070,0012) | 1C | Location of the Unformatted Test Value (0070,0006) relative to the vertical edges of the bounding box. Enumerated Values: LEFT Closest to the left edge RIGHT Closest to the right edge CENTER Centered See Section C.10.5.1.1. Required if Bounding Box Top Left Hand Corner (0070,0010) is present.
>Referenced Structured Context Sequence | (0070,1903) | 3 | Reference to a node in a Structured Report Instance providing context for this annotation. Only one Item shall be present in this Sequence. See Section C.11.28.2.
>>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
>>Referenced Content Item | (0070,1904) | 1 | Reference to a Content Item in the referenced Structured Report specified as the Observation UID (0040,A171) of the Content Item.

#### C.11.28.1 Annotation Clipping

A graphic defined by the Volumetric Annotation Sequence (0070,1901) may contain data that falls outside the view defined by the Volumetric Presentation State geometry.

If the Volumetric Presentation State intends that an annotation be clipped where it falls outside the defined view, Annotation Clipping (0070,1907) shall have a value of YES.

If the Volumetric Presentation State intends that an annotation be displayed in its entirely even where it does not intersect the volume of interest then Annotation Clipping (0070,1907) shall have a value of NO.

Any visual clues used to indicate where the annotation does and does not intersect the volume of interest are not specified by the Volumetric Presentation State.

### Note

For example, the projection of a 3D curve onto a plane could be done such that the curve would be a rendered differently depending on if it is above, below or on the defined plane.

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DICOM PS3.3 2020c - Information Object Definitions