TY - JOUR
T1 - Sonar fetal cephalometry
T2 - Comparison of bistable with gray scale and real-time techniques
AU - Santos-Ramos, Rigoberto
AU - Duenhoelter, Johann H.
AU - Reisch, Joan S.
N1 - Funding Information:
throughout gestation are also applicable to the measurements from real-time images. This conclusion is supported by the findings in t.he present study, although we measured the biparietal diameter on bistable images from the outer-to-outer margins, according to the method of Brown.5 The question of variability between measurements from two examiners was not,addressed in the present study. However, Docker and Settatree6 presented data from which the coefficient of variation for two examiners, each using both conventional bistable and real-time techniques, could be calculated. The coefficient of variation for repeated bistable measurements ranged from 0.56 to 3.67 for an experienced examiner, and from 0.53 to 3.94 for an inexperienced examiner. The values for real-time measurements ranged from 0.25 to REFERENCES 1. Santos-Ramos, R., Duenhoelter, J. H., Reisch, J. S., Cox,
PY - 1980/3/15
Y1 - 1980/3/15
N2 - The fetal biparietal diameter was measured simultaneously with B-scan bistable and gray scale techniques and subsequently with real-time ultrasonography. Measurements were made from outer table to outer table with the bistable technique, which has been proven to be accurate and reliable. With the gray scale and real-time modalities, distances were measured between several landmarks from the same image. Of all measurements taken from gray scale and realtime images, those between the centers of each band outlining the fetal skull showed the best correlation and the closest values to measurements using the standard bistable technique. Discrepancies exceeded 2 mm in only 5% with the gray scale and in 2% with the real-time technique. Using the measurement between outer and inner aspects of the cephalic band, the percentages of discrepancies exceeding 2 mm were 7% with gray scale and 6% with real time.
AB - The fetal biparietal diameter was measured simultaneously with B-scan bistable and gray scale techniques and subsequently with real-time ultrasonography. Measurements were made from outer table to outer table with the bistable technique, which has been proven to be accurate and reliable. With the gray scale and real-time modalities, distances were measured between several landmarks from the same image. Of all measurements taken from gray scale and realtime images, those between the centers of each band outlining the fetal skull showed the best correlation and the closest values to measurements using the standard bistable technique. Discrepancies exceeded 2 mm in only 5% with the gray scale and in 2% with the real-time technique. Using the measurement between outer and inner aspects of the cephalic band, the percentages of discrepancies exceeding 2 mm were 7% with gray scale and 6% with real time.
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U2 - 10.1016/0002-9378(80)90459-7
DO - 10.1016/0002-9378(80)90459-7
M3 - Article
C2 - 7355967
AN - SCOPUS:0018842222
SN - 0002-9378
VL - 136
SP - 805
EP - 807
JO - American journal of obstetrics and gynecology
JF - American journal of obstetrics and gynecology
IS - 6
ER -