X/Y Focus Center second value
The NM Detector Module (C.8.4.11) contains the two attributes:
X Focus Center (00018,1183) and Y Focus Center (0018,1184).
Described in the DICOM standard as follows:
C.18.104.22.168.2 Focus Center
X Focus Center (0018,1183) and Y Focus Center (0018,1184) for NM Image
data is used to define the projection of the focus for a converging or
diverging collimator within the un-zoomed Field of View. It is defined
in mm for row and column relative to the center of the un-zoomed Field
According to the Data Dictionary these have a VM of "1-2".
Can anyone explain what the second value in these attributes is for if
it is present?
Thanks in advance,