GE Voluson S6 Basic User Manual page 364

Volume Mode
9.15.4 Set fetal contour
9.15.5 Set head direction
9-146
Trace the position of the fetal head point by point.
Draw a line of two points along the maximum head diameter. Then mark the most distant point
of the head contour. The head direction is automatically calculated as a line orthogonal to the
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4