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American Institute of Ultrasound in Medicine <strong>Proceedings</strong> J Ultrasound Med 32(suppl):S1–S134, 2013urements using an Auto Mod-MPI system as a novel technique for measuringthe Mod-MPI.Methods—This was a prospective study of 117 cases from 110normal singleton fetuses at 16.4 to 35.0 weeks of gestation. Two experiencedoperators each measured the left Mod-MPI twice manually and twiceautomatically using the Auto Mod-MPI system (Samsung Electronics Co,Ltd). This system operates as follows. At first, the clear image of the openingand closing clicks of mitral and aortic valves should be obtained. Whenthe operator places the cursor on the aortic outflow in a single Dopplerwaveform and presses the Set key, the system automatically places thecalipers at the beginning of each click and calculates the Mod-MPI within0.1 second. We evaluated whether the automated system can successfullymeasure the left Mod-MPI. Intraoperator and interoperator reproducibilitywere also assessed using intraclass correlation coefficients (ICCs), and themanual and automated measurements obtained by a more experienced operatorwere compared using the Bland-Altman plot and ICCs.Results—Among 117 cases, both operators successfully measuredthe left Mod-MPI in 114 cases using the Auto Mod-MPI system (successrate, 97.4%). All values of automated measurements by both operatorswere perfectly matched (ICC = 1 for both intraoperator and interoperatorreproducibility). Among the manual measurements, the intraoperator ICCsof both operators were 0.910 (95% confidence interval [CI], 0.872–0.937)and 0.826 (95% CI, 0.758–0.877), respectively. The interoperator ICCwas 0.731 (95% CI, 0.678–0.785), and the mean difference between theoperators was 0.017 (95% CI, 0.010–0.024). There was good agreementbetween the manual and automated values measured by the more experiencedoperator (ICC = 0.841).Conclusions—The Auto Mod-MPI system is a fast and reliabletechnique for measuring the Mod-MPI with excellent reproducibility.1541081 First-Trimester Pregnancy Dating by Fetal Heart Rate:A Simple FormulaSarah Obican, 1,2 * Slava Khodak Gelman, 2 John Larsen 21Maternal-Fetal Medicine, Obstetrics and Gynecology,Columbia University, New York, New York USA; 2 Obstetricsand Gynecology, Maternal-Fetal Medicine, George WashingtonUniversity, Washington, DC USAObjectives—Accurate dating is an essential tool in the managementof pregnancies. Thus, we sought:(1) to develop a new formula that establishes an association betweenfetal heart rate (FHR) and gestational age in pregnancies
American Institute of Ultrasound in Medicine <strong>Proceedings</strong> J Ultrasound Med 32(suppl):S1–S134, 2013pict the fetus in the same midsagittal plane required for nuchal translucencymeasurement. Subsequently, to ensure uniformity in the approach,standardization, a prerequisite for automation, had to be completed in 2 ofthe 3 orthogonal planes prior to navigating through the volume to commencethe navigation from the plane of the transverse abdominal circumference.This was accomplished by placing the reference dot in the fetalspine at the level of the diaphragm in plane A, generating a transverseplane of the fetal abdomen with the fetal stomach visible in plane B. PlaneB was then chosen as the designated reference plane 0 from which to navigatewithin the volume. We coined this standardized approach the midsagittalvolume technique, and it was carried out on all the volume data setsprior to navigating through each volume. Parallel shift was used startingfrom plane 0, and the spatial relationships to 7 planes (5 cephalad and 2caudad) were established. The median and range were calculated for eachof the planes, and they were evaluated as a function of the fetal crownrump length. P < .05 was considered statistically significant.Results—A total of 63 volume data sets were analyzed. The 8anatomic planes were found to adhere to normal distribution curves, andmost of the planes were in a definable relationship to each other with statisticallysignificant correlations.Conclusions—To our knowledge, this is the first study to describethe possible spatial relationships between eight 2D anatomic planesin the 11 + 6- to 13 + 6-week fetus, using a standardized approach. Definingthese spatial relationships may serve as the first step for the potentialfuture development of automation software for fetal anatomic assessmentat 11 + 6 to 13 + 6 weeks.1537670 Does Cervical Cerclage Placement Prolong Gestation inTwin Pregnancies With a Sonographically Short Cervix?Sara Brubaker,* Samantha Do, Noelia Zork, Cara Pessel,Joy Vink, Annette Perez-Delboy, Sreedhar GaddipatiObstetrics and Gynecology, Columbia University Medical Center,New York, New York USAObjectives—There are limited data to support the use of cervicalcerclage in twin pregnancies. The practice has become less commonsince the 2005 publication of a meta-analysis that revealed an increasedrisk of adverse pregnancy outcomes among twin pregnancies in which acerclage was placed. The practice continues, however, likely driven in partby patient request. Our objective was to compare gestational age at deliveryamong patients with twins and a short cervix who underwent cerclageplacement with those who did not.Methods—We created a retrospective database of twin gestationsthat were diagnosed with a short cervix (cervical length ≤2.5 cm)between 2004 and 2012 at our institution. Mean gestational age (GA) atdelivery was compared in women who did and did not undergo cerclageplacement using a 2-sample t test. The relative risk (RR) of delivery priorto 32 and 34 weeks’ gestation was compared using a 2-sided χ 2 test.Results—Of the 158 women that met the inclusion criteria, 25underwent cerclage placement. The mean GA at delivery in the cerclagegroup was 32.6 weeks vs 33.8 weeks for the no-cerclage group (P = 0.77).The RRs of delivery at
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2013Journal ofUltrasoundin Medicine
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Small-Animal Preclinical High-Frequ
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2013 AIUM Award WinnersJoseph H. Ho
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2013 AIUM Award WinnersDistinguishe
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Endowment for Education andResearch
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Rosa De Vermette, MD, RDCS,RDMS, RO
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Kee-Hak Lim, MDG. Sharat Lin, PhDTo
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David Stark, MDA. Thomas Stavros, M
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*Presenter of scientific paper with
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Official Proceedings - AIUM

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