Article ID Journal Published Year Pages File Type
10691667 Ultrasound in Medicine & Biology 2014 7 Pages PDF
Abstract
Intra- and inter-observer reproducibility of fetal volume measurement by 3-D ultrasound scan (using VOCAL [Virtual Organ Computer-Aided Analysis] software) in 27 fetuses at 7 to 13 wk was studied. For intra-observer variability, the mean difference (MD) and 95% limits of agreement (95% LOA) at 12°, 18° and 30° were MD12 = 0.097, 95% LOA12 = -0.87 to +1.06; MD18 = 0.07, 95% LOA18 = -1.31 to +1.45; and MD30 = -0.07, 95% LOA30 = -1.55 to +1.41. The standard deviation of the differences (SDDIF) increased with crown-rump length at 12° (p = 0.0016), 18° (p = 0.0011) and 30° (p = 0.02). For inter-observer variability, MD12 = 0.15, 95% LOA12 = -1.65 to +1.95; MD18 = 0.042, 95% LOA18 = -1.79 to +1.87; and MD30 = 0.19, 95% LOA30 = -1.24 to +1.62. SDDIF increased with crown-rump length at 18° (p = 0.0084) and 30° (p = 0.0073). The accuracy of fetal volume measurement was not influenced by rotational angle or fetal size. Precision deteriorated for wider rotational angles and larger fetuses.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Acoustics and Ultrasonics
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