DICOM PS3.3 2019c - Information Object Definitions
C.8.27.5.2 IVUS Pullback Rate

The Attribute IVUS Pullback Rate (0018,3101) specifies the constant velocity of longitudinal movement of the Intravascular imaging catheter. Positive values indicate movement from Distal to Proximal (pulling back). Negative values indicate movement from Proximal to Distal (pushing forward).

DICOM PS3.3 2019c - Information Object Definitions