{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T13:38:42Z","timestamp":1780061922930,"version":"3.54.0"},"reference-count":11,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2014,8,28]],"date-time":"2014-08-28T00:00:00Z","timestamp":1409184000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2014,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Analysis of umbilical artery flow velocity waveforms characterized by pulsatility index (PI) is used to evaluate fetoplacental circulation in high\u2010risk pregnancies. However, an experienced sonographer may be able to further differentiate between various timbres of Doppler audio signals. Recently, we have developed a method for objective audio signal characterization; the method has been tested in an animal model. In the present pilot study, the method was for the first time applied to human pregnancies. Doppler umbilical artery velocimetry was performed in 13 preterm fetuses before and after two doses of 12\u00a0mg betamethasone. The auditory measure defined by the frequency band where the spectral energy had dropped 15\u00a0dB from its maximum level (MAX<jats:sub>peak\u201015\u00a0dB<\/jats:sub>), increased two days after betamethasone administration (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.001) parallel with a less pronounced decrease in PI (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.04). The new auditory parameter MAX<jats:sub>peak\u201015\u00a0dB<\/jats:sub> reflected the changes more sensitively than the PI did.<\/jats:p>","DOI":"10.1111\/aogs.12468","type":"journal-article","created":{"date-parts":[[2014,8,19]],"date-time":"2014-08-19T14:55:18Z","timestamp":1408460118000},"page":"1320-1324","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Audio spectrum analysis of umbilical artery Doppler ultrasound signals applied to a clinical material"],"prefix":"10.1111","volume":"93","author":[{"given":"Ann","family":"Thuring","sequence":"first","affiliation":[{"name":"Department of Clinical Sciences Lund, Obstetrics and Gynecology Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.Jonas","family":"Br\u00e4nnstr\u00f6m","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Lund, Logopedics, Phoniatrics &amp; Audiology Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomas","family":"Jansson","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Lund Biomedical Engineering Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karel","family":"Mar\u0161\u00e1l","sequence":"additional","affiliation":[{"name":"Department of Clinical Sciences Lund, Obstetrics and Gynecology Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,8,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.2001.00415.x"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-999326"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0064033"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1080\/00016340902730334"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/uog.8879"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1651-2227.1996.tb14164.x"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0412.1988.tb07813.x"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.2002.00782.x"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1159\/000074261"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1053\/plac.2002.0874"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2003.08.011"}],"container-title":["Acta Obstetricia et Gynecologica Scandinavica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Faogs.12468","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/aogs.12468","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,24]],"date-time":"2023-09-24T16:36:05Z","timestamp":1695573365000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/aogs.12468"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,8,28]]},"references-count":11,"journal-issue":{"issue":"12","published-print":{"date-parts":[[2014,12]]}},"alternative-id":["10.1111\/aogs.12468"],"URL":"https:\/\/doi.org\/10.1111\/aogs.12468","archive":["Portico"],"relation":{},"ISSN":["0001-6349","1600-0412"],"issn-type":[{"value":"0001-6349","type":"print"},{"value":"1600-0412","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,8,28]]},"assertion":[{"value":"2014-04-23","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-08-03","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2014-08-28","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}