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Coronal biparietal diameter. A reliable alternative to the traditional transverse biparietal diameter.
Author(s) -
Goldkrand J W,
Kuhlman T,
Fox E,
Foggo B M
Publication year - 1990
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1990.9.10.555
Subject(s) - coronal plane , medicine , biparietal diameter , fetal head , transverse plane , anatomy , occiput , transverse diameter , exencephaly , sagittal plane , fetus , nuclear medicine , gestational age , head circumference , pregnancy , genetics , teratology , biology
The traditional ultrasonically derived fetal biparietal diameter (BPD) is important in the determination of fetal age, weight, and growth. This measure cannot be obtained, however, with direct occiput anterior or posterior or with a head in the pelvis. This study looked at the BPD utilizing coronal (anatomically at right angles to the traditional BPD through the thalami, third ventricle, and cavum septum pellucidum) rather than transverse section through the fetal head. In 265 patients at 14 to 41 weeks' gestation, simultaneous measurement of the coronal and transverse BPDs revealed that they were interchangeable (r = 0.99). The major drawback of the coronal BPD is the inability to obtain a head circumference because of the absence of the occipitofrontal diameter.