DICOM PS3.3 2024a - Information Object Definitions
A.90.2.4.3 Referenced Image Sequence

In cutaneous confocal microscopy the Referenced Image Sequence (0008,1140) may be used to identify the SOP instance of a Dermoscopic, or Visible Light image correlated to the Confocal Microscopy acquisition in which case the value of Purpose of Reference Code Sequence (0040,A170) shall be (121311, DCM, "Localizer").

DICOM PS3.3 2024a - Information Object Definitions