Document Detail

Three-dimensional Doppler evaluation of single spherical samples from the placenta: intra- and interobserver reliability.
MedLine Citation:
PMID:  22173929     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To evaluate the intra- and interobserver reliability of assessment of three-dimensional power Doppler (3D-PD) indices from single spherical samples of the placenta.
METHODS: Women with singleton pregnancies at 24-40 weeks' gestation were included. Three scans were independently performed by two observers; Observer 1 performed the first and third scan, intercalated by the scan of Observer 2. The observers independently analyzed the 3D-PD datasets that they had previously acquired using four different methods, each using a spherical sample: random sample extending from basal to chorionic plate; random sample with 2 cm(3) of volume; directed sample to the region subjectively determined as containing more color Doppler signals extending from basal to chorionic plate; or directed sample with 2 cm(3) of volume. The vascularization index (VI), flow index (FI) and vascularization flow index (VFI) were evaluated in each case. The observers were blinded to their own and each other's results. Additional evaluation was performed according to placental location: anterior, posterior and fundal or lateral. Intra- and interobserver reliability was assessed by intraclass correlation coefficients (ICC).
RESULTS: Ninety-five pregnancies were included in the analysis. All three placental 3D-PD indices showed only weak to moderate reliability (ICC < 0.66 and ICC < 0.48, intra- and interobserver, respectively). The highest values of ICC were observed when using directed spherical samples from basal to chorionic plate. When analyzed by placental location, we found lower ICCs for lateral and fundal placentae compared to anterior and posterior ones.
CONCLUSION: Intra- and interobserver reliability of assessment of placental 3D-PD indices from single spherical samples in pregnant women greater than 24 weeks' gestation is poor to moderate, and clinical usefulness of these indices is likely to be limited.
W P Martins; J C Lima; A W Welsh; E Araujo Júnior; E Araujo; A H Miyague; F M Filho; N J Raine-Fenning
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  40     ISSN:  1469-0705     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-08-22     Completed Date:  2013-05-10     Revised Date:  2014-01-09    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  200-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 ISUOG. Published by John Wiley & Sons, Ltd.
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MeSH Terms
Imaging, Three-Dimensional / methods*
Observer Variation
Placenta / ultrasonography*
Reproducibility of Results
Ultrasonography, Doppler / methods*
Ultrasonography, Prenatal / methods*
Erratum In:
Ultrasound Obstet Gynecol. 2013 Dec;42(6):728
Note: Araujo, E Jr [corrected to Araujo Júnior, E]

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