DICOM PS3.17 2021b - Explanatory Information

YY.2 An Example of Distance Line Defined As A Combined Graphic Object (Current)
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## YY.2 An Example of Distance Line Defined As A Combined Graphic Object

Now, a distance line is defined as a combined graphic object, i.e., grouping a text object with a polyline graphic object (see Figure YY-2). Distance lines are typically used for measurements and for computing the grayscale values along this line to build up a profile curve.

This simple example is intended to show how the Graphic Group ID (0070,0295) is used for grouping of graphic annotations.

Figure YY-2. Combined Graphic Object 'DistanceLine'

Table YY-3. Graphic Group Module

Attribute Name | Tag | Attribute Value
--- | --- | ---
Graphic Group Sequence | (0070,0234) |
>Graphic Group ID | (0070,0295) | 1
>Graphic Group Label | (0070,0207) | DistanceLine
>Graphic Group Description | (0070,0208) | Measurement Tool

Table YY-4. Graphic Annotation Module Attributes

Attribute Name | Tag | Attribute Value
--- | --- | ---
Graphic Annotation Sequence | (0070,0001) | …
… |  |
>Text Object Sequence | (0070,0008) |
>>Anchor Point Annotation Units | (0070,0004) | PIXEL
>>Anchor Point | (0070,0014) | 70/20
>>Anchor Point Visibility | (0070,0015) | N
>>Unformatted Text Value | (0070,0006) | 52.20 mm
>>Graphic Group ID | (0070,0295) | 1
… |  |
>Compound Object Sequence | (0070,0009) |
>>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
>>Graphic Group ID | (0070,0295) | 1

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DICOM PS3.17 2021b - Explanatory Information