There also may exist a fixed equipment reference called the Table Frame of Reference, a Right-hand Coordinate System consisting of X T , Y T , and Z T axes originating at a reference “Table Origin”. See Figure C.8.24.2-3.
Note: In this context the Table Frame of Reference refers to a fixed coordinate system in space that may be provided by a variety of source devices such as coordinates from a magnetic position sensor, LED sensor array, a physical scanner gantry, or similar device.
A transformation may be specified between the Volume Frame of Reference and the Table Frame of Reference to define the position and orientation of the volume relative to this external frame of reference. This transformation is specified by the Volume to Table Mapping Matrix (0020,930A).
Figure C.8.24.2-3: Table Frame of Reference