Next, the magnification factor for the anteroposterior image is determined by using a similar technique with a United States dime or the superior margin of the magnification ruler aligned with the maximal biparietal diameter.
(the magnification factor for the anteroposterior image; is determined; by using a similar technique with a United States dime or the superior margin of the magnification ruler; T:Next) (the magnification ruler; aligned; with the maximal biparietal diameter)
the magnification factor for the anteroposterior image the magnification ruler
is determined aligned
by using a similar technique with a United States dime or the superior margin of the magnification ruler T:Next
with the maximal biparietal diameter