{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T10:26:12Z","timestamp":1789381572779,"version":"build-2803163510"},"reference-count":31,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2014,11,1]],"date-time":"2014-11-01T00:00:00Z","timestamp":1414800000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2014,11]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>The purpose of this study was to establish reference ranges for 2\u2010dimensional sonographic measurements of fetal lungs from longitudinal data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 214 fetal lung measurements were longitudinally evaluated in 62 healthy fetuses between 20 and 36 weeks\u2019 menstrual age. Both right and left lung areas were measured in the heart 4\u2010chamber view using lung area tracing and axis diameter methods. Multilevel modeling was used to evaluate the expected values and variability with respect to menstrual age and to generate reference ranges for the lung area, lung\u2010to\u2010head ratio, quantitative lung index, and observed\u2010to\u2010expected lung\u2010to\u2010head ratio for both lungs.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The expected values varied with menstrual age for all parameters. Variance was menstrual age dependent for all parameters except the longest diameter area measurements and their lung\u2010to\u2010head ratios.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Models are presented for expected 2\u2010dimensional sonographic lung size parameters and their variance as a function of menstrual age. These data have been used to generate age\u2010specific reference ranges for both measurements and indices.<\/jats:p><\/jats:sec>","DOI":"10.7863\/ultra.33.11.1917","type":"journal-article","created":{"date-parts":[[2014,10,21]],"date-time":"2014-10-21T21:46:01Z","timestamp":1413927961000},"page":"1917-1923","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Reference Ranges for 2\u2010Dimensional Sonographic Lung Measurements in Healthy Fetuses"],"prefix":"10.1002","volume":"33","author":[{"given":"Ingrid Schwach Werneck","family":"Britto","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edward Araujo","family":"J\u00fanior","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haleh","family":"Sangi-Haghpeykar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luiz 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