Comparison of two- and three-dimensional ultrasonography in lung volume measurement of normal fetuses

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dc.contributor.authorAraujo, Edward
dc.contributor.authorMachado Nardozza, Luciano Marcondes
dc.contributor.authorPires, Claudio Rodrigues
dc.contributor.authorGuimaraes Filho, Helio Antonio
dc.contributor.authorMoron, Antonio Fernandes
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T12:41:49Z
dc.date.available2016-01-24T12:41:49Z
dc.date.issued2007-01-01
dc.description.abstractAim: the purpose of this study was to compare the two-and three-dimensional methods for measuring fetal lung volume of normal fetuses.Methods: A cross-sectional study was performed with 51 normal pregnant women between 20 and 35 weeks. the ellipsoid formula (X*Y*Z*0.52) was used for volume calculation with the two-dimensional (2D) method. With the VOCAL (TM) (Virtual Organ Computer-aided Analysis) method, a rotation angle of 30 degrees was used. Intraclass correlation coefficient (ICC), paired Student's t-test. and Bland-Altman plots were used to compare the techniques. To calculate the intraobserver variability we used the ICC and compared the means between the two measures using the paired Student's p-test.Results: VOCAL (TM) and 2D methods were highly correlated (ICC = 0.919, and 0.873 for the right and left lungs, respectively), however, there was a disagreement. the fetal lung volume means calculated by the 2D method were always overestimated in relation to the means obtained by the VOCAL (TM), for the right lung (24.02 mL x 19.15 mL; P < 0.001), as well as for the left (16.03 mL x 13.77 mL; P = 0.002). As for the intraobserver variability, a good reproducibility was observed for the volume measurement of the left lung by the 2D technique (mean=0.40 mL.; P=0.57) and by the VOCAL (TM) (mean= -0.22 mL; P=0.63). the 2D method, however, presented low reproducibility for the right lung (mean = 1.73 mL; P = 0.31).Conclusion: the two-dimensional method had low agreement and low reproducibility in relation to the threedimensional method for measurement of fetal lung volume in normal fetuses.en
dc.description.affiliationUniversidade Federal de São Paulo, Dept Obstet, BR-04023062 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Obstet, BR-04023062 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent415-421
dc.identifierhttp://dx.doi.org/10.1515/JPM.2007.073
dc.identifier.citationJournal of Perinatal Medicine. Berlin: Walter de Gruyter Gmbh, v. 35, n. 5, p. 415-421, 2007.
dc.identifier.doi10.1515/JPM.2007.073
dc.identifier.issn0300-5577
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/29451
dc.identifier.wosWOS:000249330200010
dc.language.isoeng
dc.publisherWalter de Gruyter Gmbh
dc.relation.ispartofJournal of Perinatal Medicine
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectfetusen
dc.subjectlung volume measurementsen
dc.subjectthree-dimensional imageen
dc.subjectultrasounden
dc.titleComparison of two- and three-dimensional ultrasonography in lung volume measurement of normal fetusesen
dc.typeinfo:eu-repo/semantics/article
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