DICOM PS3.3 2020b - Information Object Definitions |
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Table C.27-2 specifies the Attributes of the Points Macro.

**Table C.27-2. Points Macro Attributes**

Specifies the number of points in the point set. See Section C.27.2.1.1. |
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A single standard deviation of the error for all the points' spatial positions. The units shall be the same as the units of the coordinate system in which the point coordinates are specified. |
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The mean point distance of the point set. It is given by the mean of the distances to the nearest neighbor over all points. The units shall be the same as the units of the coordinate system in which the point coordinates are specified. |
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The maximum distance of one point to its nearest neighbor. The units shall be the same as the units of the coordinate system in which the point coordinates are specified. |
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Two 3D locations defining the cuboid bounding box, parallel to the coordinate system axes, encompassing the point set. |
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A 3D location that combined with Center of Rotation (0066,001C) specifies the preferred axis of rotation of this object. |
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A 3D location defining the preferred center of rotation for this point set. Required if Axis of Rotation (0066,001B) is present. May be present otherwise. |

All Attributes within this Module containing points or vectors are in x-y-z order. If multiple elements are encoded, the ordering is x_{1},y_{1},z_{1},…,x_{n},y_{n},z_{n}.

The points are in the coordinate system identified by the Frame of Reference UID (0020,0052). To map these points into the coordinate system of another SOP Instance a Spatial Registration Instance can be used.

DICOM PS3.3 2020b - Information Object Definitions |
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