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(3006,0039) ROI Contour Sequence1Sequence
(0062,000C) Recommended Display Grayscale Value3Unsigned Short
(0062,000D) Recommended Display CIELab Value3Unsigned Short
(3006,002A) ROI Display Color3Integer String
(3006,0040) Contour Sequence3Sequence
(3006,0016) Contour Image Sequence3Sequence
(3006,0042) Contour Geometric Type1Code String
(3006,0046) Number of Contour Points1Integer String
(3006,0048) Contour Number3Integer String
(3006,0050) Contour Data1Decimal String
(3006,004A) Source Pixel Planes Characteristics Sequence3Sequence
(3006,004B) Source Series Sequence3Sequence
(3006,0084) Referenced ROI Number1Integer String
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Data synced with official DICOM standard on 18 April 2024. The DICOM Standard is under continuous maintenance, and the current official version is available at http://www.dicomstandard.org/current/. DICOM Parts 3, 4, and 6, © NEMA. Please note that the most recent PDF version of the standard is the official reference, and should checked when making technical decisions.

Contour Geometric Type Attribute

Tag(3006,0042)
TypeRequired (1)
KeywordContourGeometricType
Value Multiplicity1
Value RepresentationCode String (CS)

Geometric type of contour. See Section C.8.8.6.1.

Enumerated Values:

POINT

single point

OPEN_PLANAR

open contour containing coplanar points

OPEN_NONPLANAR

open contour containing non-coplanar points

CLOSED_PLANAR

closed contour (polygon) containing coplanar points

CLOSEDPLANAR_XOR

closed contour (polygon) containing coplanar points of an inner or outer contour combined using an XOR operator

Section C.8.8.6.1

C.8.8.6.1 Contour Geometric Type

A contour can be one of the following geometric types:

  • A Contour Geometric Type (3006,0042) of POINT indicates that the contour is a single point, defining a specific location of significance.

  • A Contour Geometric Type (3006,0042) of OPEN_PLANAR indicates that the last vertex shall not be connected to the first point, and that all points in Contour Data (3006,0050) shall be coplanar.

  • A Contour Geometric Type (3006,0042) of OPEN_NONPLANAR indicates that the last vertex shall not be connected to the first point, and that the points in Contour Data (3006,0050) may be non-coplanar. Contours having a Geometric Type (3006,0042) of OPEN_NONPLANAR can be used to represent objects best described by a single, possibly non-coplanar curve, such as a brachytherapy applicator.

  • A Contour Geometric Type (3006,0042) of CLOSED_PLANAR indicates that the last point shall be connected to the first point, where the first point is not repeated in Contour Data (3006,0050). All points in Contour Data (3006,0050) shall be coplanar.

  • A Contour Geometric Type (3006,0042) of CLOSEDPLANAR_XOR indicates that the last point shall be connected to the first point, where the first is not repeated in Contour Data (3006,0050). All points in Contour Data (3006,0050) shall be coplanar. More than one Contour is used to describe an ROI and these Contours are combined by geometric exclusive disjunction, see Section C.8.8.6.3. If any of the Contours within an ROI is of Contour Geometric Type (3006,0042) CLOSEDPLANAR_XOR, all Contours of that ROI shall be of the same type.