REPRODUCIBILITY OF BIPARIETAL DIAMETER MEASUREMENTS OBTAINED WITH A REAL‐TIME SCANNER

Abstract

In 80 patients, multiple measurements of the fetal biparietal diameter were made by ultrasonography during 1 examination using a real-time scanner equipped with a coded cephalometer. From the sets of data, the means and SD for the 80 patients were calculated. In 80% of cases, the individual SD of the results were less than or equal to the estimated SD of the group as a whole. The variability of measurement related to biparietal diameter was least in the range 59-83 mm. Comparison of the results obtained with the coded device and others obtained blind does not reveal any significant advantage for the coded device.