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Journal of Ultrasound in Medicine, Vol 1, Issue 4 145-150, Copyright © 1982 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

A standardized plane for biparietal diameter measurement

M. Shepard and R. A. Filly
Department of Radiology, University of California School of Medicine, San Francisco 94143.

Biparietal diameter measurement is the most widely accepted means of determining gestational age. However, a standard anatomic plane for performing this measurement has not been established. Three hundred forty-four measurements on 256 patients who gave birth to normal infants were obtained and compared at various cranial levels based on brain anatomy. The results document that use of a standardized plane increases measurement reliability but does not significantly alter variability. We postulate that variability is based predominantly on biologic variation in fetal growth rates rather than on technical errors.


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 Journal of Diagnostic Medical SonographyHome page
J. Yaghoobian
Simplified Method for Estimation of Gestationa Age by Biparietal Diameter Measurement
Journal of Diagnostic Medical Sonography, January 1, 1987; 3(1): 33 - 35.
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Copyright © 1982 by the American Institute of Ultrasound in Medicine.