9.15.7 Head progression distance
Perform this measurement in image plane A. The measurement’s point of origin is vertically
locked to the pubis. Mark the distal point of the fetal head to measure the distance between
the pubis and the head in millimeters.
9.15.8 Head progression angle
Perform this measurement in image plane A. Starting from the center of the pubis, set the end
point that the dashed line is tangent to the fetal head. The resulting measurement is the
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Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4