DICOM PS3.3 2019b - Information Object Definitions
C.8.8.15.10 Control Point 3D Position

Control Point 3D Position (300A,02D4) shall describe the absolute 3D coordinates of a source. This position shall correspond to the center of a source in an applicator during a remote or manually controlled afterloading treatment.

DICOM PS3.3 2019b - Information Object Definitions