Circumference measurements in obstetrical ultrasound: ellipse vs. arithmetic mean.
Adler
R S
RS
Department of Radiology, University of Michigan Hospitals, Ann Arbor.
Bowerman
R A
RA
Rubin
J M
JM
D005314:Embryonic and Fetal Development; D005333:Fetus / Q000033:anatomy & histology*; D006801:Humans; D008433:Mathematics; D014463:Ultrasonography / Q000379:methods*