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- W1602611546 abstract "To assess if mean sac diameter (MSD) / volume (MSV) calculations are affected by taking two measurements in an axial or lateral orientation. Axial (A) and Lateral (L) (10, 20, 30 and 40 mm) calliper targets were imaged within a commercially available ultrasound phantom (CIRS, Model 040). Measurements were repeated 10 times for a selection of ultrasound machine—transducer combinations. MSD and MSV were then calculated for A x A x L and compared with A x L x L. The greatest variation in calculated A × A × L vs. A × L × L MSD for a single machine—transducer combination at; 10 mm = 0.3 (9.9 to 10.2) mm; 20 mm = 0.3 (20.0 to 20.4) mm; 30 mm = 0.6 (29.8 to 30.4) mm; 40 mm = 0.7 (39.6 to 40.3) mm. For MSV; 10 mm = 0.04 (0.51–0.55) ml; 20 mm = 0.27(4.15–4.42) ml; 30 mm = 0.78 (13.88–14.66) ml; 40 mm = 1.81 (32.42–34.23) ml. Although axial measurements were smaller than the equivalent lateral measurement, the variation between using two axial or two lateral measurements in the calculation of mean sac diameter or volume was found to be within clinically acceptable limits (in all cases < 3% difference). This would not have a significant bearing in the measurement of mean sac diameter, and suggests that axial and lateral measurement in 3 planes is more important for taking into account variations in assumed spherical morphology than based on a particular combination of either for technical reasons. Note: by investigating TA probes in this study, we do not imply that TA ultrasound is appropriate clinically at very early gestation." @default.
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- W1602611546 date "2012-09-01" @default.
- W1602611546 modified "2023-09-26" @default.
- W1602611546 title "P20.10: Do variations between axial and lateral calliper measurements affect calculation of gestational sac measurements in early pregnancy?" @default.
- W1602611546 doi "https://doi.org/10.1002/uog.12046" @default.
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