{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,5]],"date-time":"2025-12-05T12:26:00Z","timestamp":1764937560667,"version":"build-2065373602"},"reference-count":48,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2023,5,15]],"date-time":"2023-05-15T00:00:00Z","timestamp":1684108800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["U20A20388","2019YFC0119700"],"award-info":[{"award-number":["U20A20388","2019YFC0119700"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National Key R&amp;D Program","award":["U20A20388","2019YFC0119700"],"award-info":[{"award-number":["U20A20388","2019YFC0119700"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fetal movement (FM) is an important indicator of fetal health. However, the current methods of FM detection are unsuitable for ambulatory or long-term observation. This paper proposes a non-contact method for monitoring FM. We recorded abdominal videos from pregnant women and then detected the maternal abdominal region within each frame. FM signals were acquired by optical flow color-coding, ensemble empirical mode decomposition, energy ratio, and correlation analysis. FM spikes, indicating the occurrence of FMs, were recognized using the differential threshold method. FM parameters including number, interval, duration, and percentage were calculated, and good agreement was found with the manual labeling performed by the professionals, achieving true detection rate, positive predictive value, sensitivity, accuracy, and F1_score of 95.75%, 95.26%, 95.75%, 91.40%, and 95.50%, respectively. The changes in FM parameters with gestational week were consistent with pregnancy progress. In general, this study provides a novel contactless FM monitoring technology for use at home.<\/jats:p>","DOI":"10.3390\/s23104753","type":"journal-article","created":{"date-parts":[[2023,5,15]],"date-time":"2023-05-15T08:33:01Z","timestamp":1684139581000},"page":"4753","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Non-Contact Monitoring of Fetal Movement Using Abdominal Video Recording"],"prefix":"10.3390","volume":"23","author":[{"given":"Qiao","family":"Han","sequence":"first","affiliation":[{"name":"Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China"},{"name":"Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5715-5930","authenticated-orcid":false,"given":"Dongmei","family":"Hao","sequence":"additional","affiliation":[{"name":"Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China"},{"name":"Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lin","family":"Yang","sequence":"additional","affiliation":[{"name":"Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China"},{"name":"Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yimin","family":"Yang","sequence":"additional","affiliation":[{"name":"Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China"},{"name":"Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangfei","family":"Li","sequence":"additional","affiliation":[{"name":"Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China"},{"name":"Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"16747","DOI":"10.1109\/ACCESS.2017.2716964","article-title":"Fetal movement measurement and technology: A narrative review","volume":"5","author":"Stanger","year":"2017","journal-title":"IEEE Access"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1055\/s-2007-994431","article-title":"Decreased amniotic fluid volume at <32 weeks of gestation is associated with decreased fetal movement","volume":"13","author":"Sherer","year":"1996","journal-title":"Am. 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