DICOM PS3.17 2021b - Explanatory Information

YY Compound and Combined Graphic Objects in Presentation States (Informative) (Current)
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# YY Compound and Combined Graphic Objects in Presentation States (Informative)

Presentation States may contain Compound Graphics and combined graphic objects. Two illustrative examples are given in this informative annex to explain these two concepts.

First, an example of a Compound Graphic is given, an AXIS object, and secondly an example of a combined graphic object is given, a distance line.

The rendered appearance of the Compound Graphics (such as illustrated in Figure YY-1) are recommendations and are not mandatory. For example, the Compound Graphic 'AXIS' can look slightly different on different viewing workstations.

## YY.1 An Example of The Compound Graphic 'axis'

The AXIS from Figure YY-1 is defined in the following Compound Graphic Sequence (0070,0209) (see the following Table YY-1). An AXIS object is typically used for measurement purposes.

Figure YY-1. Compound Graphic 'AXIS'

Table YY-1. Graphic Annotation Module Attributes

Attribute Name | Tag | Attribute Value
--- | --- | ---
Graphic Annotation Sequence | (0070,0001) | …
… |  |
>Compound Graphic Sequence | (0070,0209) |
>>Compound Graphic Instance ID | (0070,0226) | 1
>>Compound Graphic Units | (0070,0282) | PIXEL
>>Graphic Dimensions | (0070,0020) | 2
>>Number of Graphic Points | (0070,0021) | 2
>>Graphic Data | (0070,0022) | 10\10\150\10
>>Compound Graphic Type | (0070,0294) | AXIS
>>Major Ticks Sequence | (0070,0287) |
%item |  |
>>>Tick Position | (0070,0288) | 0
>>>Tick Label | (0070,0289) | 20
%enditem |  |
%item |  |
>>>Tick Position | (0070,0288) | 0.25
>>>Tick Label | (0070,0289) | 30
%enditem |  |
%item |  |
>>>Tick Position | (0070,0288) | 0.5
>>>Tick Label | (0070,0289) | 40
%enditem |  |
%item |  |
>>>Tick Position | (0070,0288) | 0.75
>>>Tick Label | (0070,0289) | 50
%enditem |  |
%item |  |
>>>Tick Position | (0070,0288) | 1.0
>>>Tick Label | (0070,0289) | 60
%enditem |  |
%endseq |  |
>>Tick Alignment | (0070,0274) | CENTER
>>Tick Label Alignment | (0070,0279) | BOTTOM
>>Show Tick Label | (0070,0278) | Y

The following table shows the simple graphic objects for an axis. The breakdown of the axis into simple graphics is up to the implementation. The Compound Graphic Instance ID (0070,0226) is used to relate the compound and the simple representation. To keep the example short only the first major tick is shown.

Table YY-2. Graphic Annotation Module Attributes

Attribute Name | Tag | Attribute Value | Comment
--- | --- | --- | ---
Graphic Annotation Sequence | (0070,0001) | … |
… |  |  |
>Text Object Sequence | (0070,0008) |  | Tick Labels
>>Anchor Point Annotation Units | (0070,0004) | PIXEL | First Tick Label
>>Anchor Point | (0070,0014) | 8/22 |
>>Anchor Point Visibility | (0070,0015) | N |
>>Unformatted Text Value | (0070,0006) | 20 |
>>Compound Graphic Instance ID | (0070,0226) | 1 |
… |  |  |
>Graphic Object Sequence | (0070,0009) |  | Primary Axis Line
>>Graphic Annotation Units | (0070,0005) | PIXEL |
>>Graphic Dimensions | (0070,0020) | 2 |
>>Number of Graphic Points | (0070,0021) | 2 |
>>Graphic Data | (0070,0022) | 10\10\150\10 |
>>Graphic Type | (0070,0023) | POLYLINE |
>>Compound Graphic Instance ID | (0070,0226) | 1 |
… |  |  |
>>Graphic Annotation Units | (0070,0005) | PIXEL | First Major Tick
>>Graphic Dimensions | (0070,0020) | 2 |
>>Number of Graphic Points | (0070,0021) | 2 |
>>Graphic Data | (0070,0022) | 10\5\10\15 |
>>Graphic Type | (0070,0023) | POLYLINE |
>>Compound Graphic Instance ID | (0070,0226) | 1 |
… |  |  |

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XX.6 CAD Rendering | Home | YY.2 An Example of Distance Line Defined As A Combined Graphic Object

DICOM PS3.17 2021b - Explanatory Information