{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T22:27:58Z","timestamp":1767911278498,"version":"3.49.0"},"reference-count":26,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2024,2,1]],"date-time":"2024-02-01T00:00:00Z","timestamp":1706745600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2024,2]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objective<\/jats:title>\n To assess the reproducibility of ultrasound measurements of fetal biometry using a \u2018focus point\u2019 to assist the acquisition of the relevant plane.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n This was a study of 80 women with a singleton non\u2010anomalous pregnancy who attended University College London Hospital, London, UK, between 18 and 37\u2009weeks' gestation. Planes to measure head circumference (HC), abdominal circumference (AC) and femur length (FL) were obtained four times by two different sonographers with different levels of experience, who were blinded to one another; the first set of images was obtained with reference to a standard image, and the second set of images was obtained using the focus point technique. The focus point was defined as a unique fetal anatomical landmark in each plane (cavum septi\u00a0pellucidi for HC, two\u2010thirds of the umbilical vein for AC and one of the two extremities of the diaphysis for FL). Once identified, the focus point was maintained in view while the sonographer rotated the probe along three axes (\n x<\/jats:italic>\n ,\n y<\/jats:italic>\n ,\n z<\/jats:italic>\n ) to acquire the relevant plane. Sonographers were either in training or had >\u20093000 scans worth of experience. Intra\u2010 and interobserver reproducibility were assessed using Bland\u2013Altman plots, and absolute values and percentages for mean difference and 95% limits of agreement (LoA) were reported.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Overall reproducibility was good, with all 95%\u2009LoA <\u20098%. Reproducibility was improved by use of the focus point compared with the standard technique for both intraobserver comparison (95%\u2009LoA, <\u20094%\n vs<\/jats:italic>\n <\u20096%) and interobserver comparison (95%\u2009LoA, <\u20097%\n vs<\/jats:italic>\n <\u20098%). These findings were independent of sonographer seniority and plane acquired.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n \n Reproducibility of fetal biometry assessment is improved with use of the focus point for plane acquisition, regardless of sonographer experience. We propose that this method should be implemented in clinical practice and training programs in fetal biometry. \u00a9 2023 The Authors.\n Ultrasound in Obstetrics & Gynecology<\/jats:italic>\n published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/uog.27436","type":"journal-article","created":{"date-parts":[[2023,7,31]],"date-time":"2023-07-31T03:43:21Z","timestamp":1690775001000},"page":"237-242","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Use of focus point for plane acquisition to improve reproducibility in fetal biometry"],"prefix":"10.1002","volume":"63","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8994-4734","authenticated-orcid":false,"given":"S.","family":"Vignola","sequence":"first","affiliation":[{"name":"Fetal Medicine Unit University College London Hospitals NHS Foundation Trust London 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