DICOM PS3.3 2021e - Information Object Definitions

## 10.38 Outline Definition Macro

The Outline Definition Macro describes a 2D outline in a given coordinate system.

Table 10.38-1. Outline Definition Macro Attributes

Attribute Name

Tag

Type

Attribute Description

Outline Shape Type

(0018,1630)

1

Type of shape of the outline.

Enumerated Values:

RECTANGULAR

CIRCULAR

POLYGONAL

Outline Left Vertical Edge

(0018,1631)

1C

X-coordinate in mm of the left edge of the rectangular outline (parallel to the y-axis of the coordinate system).

Required if Outline Shape Type (0018,1630) is RECTANGULAR.

Outline Right Vertical Edge

(0018,1632)

1C

X-coordinate in mm of the right edge of the rectangular outline (parallel to the y-axis of the coordinate system).

Required if Outline Shape Type (0018,1630) is RECTANGULAR.

Outline Upper Horizontal Edge

(0018,1633)

1C

Y-coordinate in mm of the upper edge of the rectangular outline (parallel to the x-axis of the coordinate system).

Required if Outline Shape Type (0018,1630) is RECTANGULAR.

Outline Lower Horizontal Edge

(0018,1634)

1C

Y-coordinate in mm of the lower edge of the rectangular outline (parallel to the x-axis of the coordinate system).

Required if Outline Shape Type (0018,1630) is RECTANGULAR.

Center of Circular Outline

(0018,1635)

1C

Location (x,y) in mm of the center of the circular outline.

Required if Outline Shape Type (0018,1630) is CIRCULAR.

Diameter of Circular Outline

(0018,1636)

1C

Diameter in mm of the circular outline.

Required if Outline Shape Type (0018,1630) is CIRCULAR.

Number of Polygonal Vertices

(0018,1637)

1C

Number of Vertices in Vertices of the Polygonal Outline (0018,1638).

Required if Outline Shape Type (0018,1630) is POLYGONAL.

Vertices of the Polygonal Outline

(0018,1638)

1C

A data stream of pairs of x and y in mm. Polygonal outlines are implicitly closed from the last vertex to the origin vertex and all edges shall be non-intersecting except at the vertices. Any given vertex shall occur only once in the data stream.

Required if Outline Shape Type (0018,1630) is POLYGONAL.

The number of pairs in this data stream shall equal the value of Number of Polygonal Vertices (0018,1637).

### 10.38.1 Outline Definition Macro Attribute Description

#### 10.38.1.1 Outline Shape Type

When outline shape is a rectangle or a circle per design, the Outline Shape Type (0018,1630) shall have the value RECTANGULAR or CIRCULAR respectively and the outline shall not be represented as a polyline.

#### 10.38.1.2 Coordinate Definitions

The values are defined in a plane that is declared in the invocation of the Macro.

DICOM PS3.3 2021e - Information Object Definitions