{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,11,20]],"date-time":"2023-11-20T15:40:22Z","timestamp":1700494822034},"reference-count":32,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2011,6,20]],"date-time":"2011-06-20T00:00:00Z","timestamp":1308528000000},"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":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2011,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate the reproducibility of estimation of power Doppler\u2010derived fractional moving blood volume (FMBV) in the uterine cervix of women with uncomplicated pregnancies.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Two experienced operators evaluated 30 uncomplicated singleton pregnancies at 20\u201324 weeks of gestation. The PDU box was positioned in a mid\u2010sagittal view of the cervix, including the internal os and external os, in the same plane as that in which cervical length is measured. Two consecutive examinations were performed by each operator, in each of which the cervical length was measured and five consecutive good\u2010quality images with PDU information were obtained. The region of interest (ROI) (cervix) was delineated offline and FMBV, which expresses the percentage of blood occupying the ROI, was calculated with purpose\u2010designed software. Intra\u2010 and interobserver intraclass correlation coefficients (ICCs) and mean differences with 95% limits of agreement (LOA) were calculated.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The median gestational age at examination was 22 + 0 weeks. Measurements (median \u00b1 SD) obtained for cervical length and FMBV were as follows: Operator A: 37 \u00b1 7.4 mm and 8.11 \u00b1 2.9%; Operator B: 37.5 \u00b1 9.3 mm and 7.9 \u00b1 3.3%, respectively. The intra\u2010 and interobserver ICCs for FMBV were 0.88 (95% CI, 0.75\u20130.94) and 0.82 (95% CI, 0.64\u20130.94), respectively. There was a mean difference in FMBV measurement between operators of \u2212 0.2 \u00b1 1.75% (95% LOA, \u2212 3.7 to 3.2%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Reproducible assessment of cervical blood perfusion through estimation of FMBV can be achieved while cervical length is being measured. Copyright \u00a9 2011 ISUOG. 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