Tables C.29.1.5-2 – C.29.1.5-4 contain macros for the definition of landmarks that can be used during planning to align an implant template with patient geometry.

All attributes within these Macros that contain 3D points or vectors are in x, y, z order. If multiple elements are encoded, the ordering is x
_{
1
}
y
_{
1
}
z, … , x
_{
n
}
y
_{
n
}
z
_{
n
}
, The points are in the coordinate system identified by the Frame of Reference UID 0020,0052.

Table C.29.1.5-2
*
PLANNING LANDMARK POINT MACRO
*

Attribute Name | Tag | Type | Attribute Description |

2D Point Coordinates Sequence | (0068,6550) | 1C | 2D coordinates of the point in the HPGL documents. One or more Items shall be included in this sequence. Required if 3D Point Coordinates (0068,6590) is not present and HPGL Document Sequence (0068,62C0) is present. May be present if 3D Point Coordinates (0068,6590) is present and HPGL Document Sequence (0068,62C0) is present. |

>Referenced HPGL Document ID | (0068,6440) | 1 | Value of the HPGL Document ID (0068,62D0) present in the HPGL Document Sequence (0068,62C0) that contains the 2D Drawing including the planning landmark. Shall be unique within the sequence. |

>2D Point Coordinates | (0068,6560) | 1 | Coordinates of the point in the HPGL document. Coordinates are measured in millimeters of the printing space. See C.29.1.2.1.1. |

3D Point Coordinates | (0068,6590) | 1C | 3D Coordinates of the point. Required if 2D Point Coordinates Sequence (0068,6550) is not present and Implant Template 3D Model Surface Number (0068,6350) is present. May be present if 2D Point Coordinates Sequence (0068,6550) is present and Implant Template 3D Model Surface Number (0068,6350) is present. |

Table C.29.1.5-3
*
PLANNING LANDMARK LINE MACRO
*

Attribute Name | Tag | Type | Attribute Description |

2D Line Coordinates Sequence | (0068,65A0) | 1C | 2D coordinates of the line in the HPGL documents. One or more Items shall be included in this sequence. Required if 3D Line Coordinates (0068,65D0) is not present and HPGL Document Sequence (0068,62C0) is present. May be present if 3D Line Coordinates (0068,65D0) is present and HPGL Document Sequence (0068,62C0) is present. |

>Referenced HPGL Document ID | (0068,6440) | 1 | Value of the HPGL Document ID (0068,62D0) present in the HPGL Document Sequence (0068,62C0) that contains the 2D Drawing including the planning landmark. Shall be unique within the sequence. |

>2D Line Coordinates | (0068,65B0) | 1 | Coordinates of the line in the HPGL document. Coordinates are measured in millimeters of the printing space. See C.29.1.2.1.1. |

3D Line Coordinates | (0068,65D0) | 1C | 3D Coordinates of the line. Required if 2D Line Coordinates Sequence (0068,65A0) is not present and Implant Template 3D Model Surface Number (0068,6350) is present. May be present, if 2D Line Coordinates Sequence (0068,65A0) is present and Implant Template 3D Model Surface Number (0068,6350) is present. |

Table C.29.1.5-4
*
PLANNING LANDMARK PLANE MACRO
*

Attribute Name | Tag | Type | Attribute Description |

2D Plane Coordinates Sequence | (0068,65E0) | 1C | 2D coordinates of the plane’s intersection with the HPGL documents. One or more Items shall be included in this sequence. Required if 3D Plane Origin (0068,6610) is not present and HPGL Document Sequence (0068,62C0) is present. May be present if 3D Plane Origin (0068,6610) is present and HPGL Document Sequence (0068,62C0) is present. |

>Referenced HPGL Document ID | (0068,6440) | 1 | Value of the HPGL Document ID (0068,62D0) present in the HPGL Document Sequence (0068,62C0) that contains the 2D Drawing including the planning landmark. Shall be unique within the sequence. |

>2D Plane Intersection | (0068,65F0) | 1 | 2D Coordinates of the intersection of the plane with the projection plane. Coordinates are measured in Millimeters of the printing space. See C.29.1.2.1.1. |

3D Plane Origin | (0068,6610) | 1C | 3D Coordinates of the plane origin. Required if 2D Plane Coordinates Sequence (0068,65E0) is not present and Implant Template 3D Model Surface Number (0068,6350) is present. May be present if 2D Plane Coordinates Sequence (0068,65E0) is present and Implant Template 3D Model Surface Number (0068,6350) is present. |

3D Plane Normal | (0068,6620) | 1C | 3D Coordinates of the plane normal. Required if 3D Plane Origin (0068,6610) is present. |

C.29.1.5.1.1.1 2D Coordinates Sequences

The 2D Point Coordinates Sequence (0068,6550) and 2D Line Coordinates Sequence (0068,65A0) contain the positions of point, line or plane landmarks in 2D templates. Each sequence item consists of a reference to one of the 2D templates and the point coordinates of the landmark with respect to that template. The Coordinates are with respect to the origin of the HPGL Document and are specified in Millimeters of the printing space.