PURPOSE: Determine the reproducibility of 3D ultrasound (3DUS) measurements of fetal and placental volumes. METHODS: We included 34 pregnant women between gestational weeks (GW) 11-18. Two operators independently acquired fetal and placental volumes using 3DUS. Each volume was acquired twice and stored on disk for off-line analysis. Intra- and interobserver reproducibility was expressed in the intra- and interclass correlation coefficient (intra-CC and inter-CC). In addition, the 3DUS volumes acquired by the first operator were calculated by the second and vice-versa to evaluate the effect of volume acquisition and caliper placement. A value >0.75 was considered a good agreement. RESULTS: Fetal and placental volume measurements were successful in 97% of all cases. Between GW 11-14 and 14-18 the median fetal volume was 20.8 (5.0-35.1) and 51.7 (37.9-132.8) ml, the median placental volume was 71.3 (40.9-111.9) and 120.7 (94.2- 273.7) ml. Bland-Altman plots were used for statistical analysis. The intraobserver reproducibility was good for fetus (intra-CC: 0.99; 0.99) and placenta (intra-CC: 0.99; 0.98). Also, interobserver reproducibility was good for fetus (inter-CC 0.98) and placenta (inter-CC 0.98). In addition, regardless of the operator who acquired the volumes, the inter-CC remained good for both fetus (inter-CC: 0.99; 0.99) and placenta (inter-CC: 0.97; 0.99). CONCLUSION: The reproducibility of fetal and placental volume measurements by 3DUS between GW 11-18 is good. In addition, individually chosen caliper placement and volume acquisition has no effect on the calculation of either volumes. Copyright 2007 Wiley Periodicals, Inc.
PURPOSE: Determine the reproducibility of 3D ultrasound (3DUS) measurements of fetal and placental volumes. METHODS: We included 34 pregnant women between gestational weeks (GW) 11-18. Two operators independently acquired fetal and placental volumes using 3DUS. Each volume was acquired twice and stored on disk for off-line analysis. Intra- and interobserver reproducibility was expressed in the intra- and interclass correlation coefficient (intra-CC and inter-CC). In addition, the 3DUS volumes acquired by the first operator were calculated by the second and vice-versa to evaluate the effect of volume acquisition and caliper placement. A value >0.75 was considered a good agreement. RESULTS: Fetal and placental volume measurements were successful in 97% of all cases. Between GW 11-14 and 14-18 the median fetal volume was 20.8 (5.0-35.1) and 51.7 (37.9-132.8) ml, the median placental volume was 71.3 (40.9-111.9) and 120.7 (94.2- 273.7) ml. Bland-Altman plots were used for statistical analysis. The intraobserver reproducibility was good for fetus (intra-CC: 0.99; 0.99) and placenta (intra-CC: 0.99; 0.98). Also, interobserver reproducibility was good for fetus (inter-CC 0.98) and placenta (inter-CC 0.98). In addition, regardless of the operator who acquired the volumes, the inter-CC remained good for both fetus (inter-CC: 0.99; 0.99) and placenta (inter-CC: 0.97; 0.99). CONCLUSION: The reproducibility of fetal and placental volume measurements by 3DUS between GW 11-18 is good. In addition, individually chosen caliper placement and volume acquisition has no effect on the calculation of either volumes. Copyright 2007 Wiley Periodicals, Inc.
Authors: André Dallmann; Ibrahim Ince; Michaela Meyer; Stefan Willmann; Thomas Eissing; Georg Hempel Journal: Clin Pharmacokinet Date: 2017-11 Impact factor: 6.447
Authors: Linda Wu; Ana Ferreira; Gordon N Stevenson; Jennifer Sanderson; Aditi Mahajan; Neama Meriki; Alec W Welsh Journal: Australas J Ultrasound Med Date: 2017-07-11
Authors: Marcus J Rijken; William E Moroski; Suporn Kiricharoen; Noaeni Karunkonkowit; Gordon Stevenson; Eric O Ohuma; J Alison Noble; Stephen H Kennedy; Rose McGready; Aris T Papageorghiou; François H Nosten Journal: Malar J Date: 2012-01-05 Impact factor: 2.979