Abstract
Objectives: To determine the inter- and intra-observer variation of volume calculations of human fetuses at a gestational age of 11 +0-13 +6 weeks by three-dimensional ultrasound (3DUS). Methods: 3DUS datasets were acquired during nuchal translucency measurements. The fetal volume (FV) was measured in 65 cases by two independent investigators. The Virtual Organ Computer aided AnaLysis (VOCAL™) imaging software was used to manually calculate the FV (rotational angle 9°). Inter- and intra-observer variation were assessed by Bland-Altman plots and intraclass correlation coefficients (ICC). Results: Both inter- and intraobserver reproducibility were highly reliable as shown by the Bland-Altman plots and an ICC of respectively 0.934 and 0.994. Conclusion: FV calculation by 3DUS with VOCAL and a rotational angle of 9° is feasible and has a high inter- and intraobserver reliability in the first trimester of pregnancy.
Original language | English |
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Pages (from-to) | 539-543 |
Number of pages | 5 |
Journal | Journal of Perinatal Medicine |
Volume | 39 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 Sep 2011 |
Keywords
- Fetal volume
- first trimester
- interobserver variation
- intraobserver variation
- three-dimensional ultrasound