DICOM Standard Browser

Defined Terms:

POINT

a single point designating a single fiducial point.

Note

A point may be the epicenter of a more complex shape such as sphere.

LINE

two points that specify a line or axis such as the inter-orbital line. The point locations have no significance other than identifying the line, i.e., they are not line segment end points.

PLANE

three points that identify a plane such as the laterality plane

SURFACE

three or more points (usually many) that reside on, or near, a region of a curved surface. The surface may be flat or curved, closed or open. The point order has no significance.

RULER

two or more evenly spaced collinear points ordered sequentially along the line, such as a physical ruler placed in the imaging field.

L_SHAPE

three points of two perpendicular line segments, AB and BC, having a common end point B. The order of the points is: ABC. May represent an L-shaped marker placed in the imaging field.

T_SHAPE

three points of two perpendicular line segments AB and CD, such that C bisects AB. The order is ABD.

SHAPE

two or more points that specify the shape of a well-known fiducial type. The term in the Fiducial Identifier Code Sequence (0070,0311) defines the shape and the order of the points that represent it. A shape is closed if the first and last point are the same, but not otherwise. Two different points are a line segment.