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Frontomaxillary facial angle measurement at 11-14 weeks: Assessment of interobserver and intraobserver agreement in 2D and 3D imaging

journal contribution
posted on 28.07.2021, 01:40 by Jennifer AlphonseJennifer Alphonse, Jenny Cox, Jillian L Clarke, Catherine L Robinson, Philip J Schluter, Andrew Mclennan
Introduction: The primary aim of this study was to assess the interobserver and intraobserver reproducibility of the first-trimester frontomaxillary facial angle (FMFA) measurement using both 2D and 3D ultrasound. Assessment of the relationship between crown-to-rump length (CRL) and FMFA measurement was also reviewed. Materials and Methods: Two experienced operators imaged the same 30 patients over a 1-month period collecting both 2D static images and 3D volumes during nuchal translucency assessment at 11-14 weeks' gestation. The operators were blinded to each other's images and results. Results: The mean 2D FMFA measurement was 88.0° and 88.4° for observer 1 and 2, respectively; while the mean 3D FMFA measurement was 87.8° and 88.0°, respectively. Intraclass correlation suggests good intraobserver and interobserver agreement with no statistically significant difference between operators in either 2D (p = 0.14) or 3D (p = 0.11) measurements. The FMFA was unchanged with increasing CRL. Discussion: Both 2D and 3D FMFA measurements have been demonstrated to be equivalent and reliable. Strict image acquisition criteria must be followed for accurate and reproducible FMFA measurements. There was no change demonstrated in FMFA measurement with increasing CRL. Copyright © 2013 S. Karger AG, Basel.

History

Volume

34

Issue

2

Start Page

90

End Page

95

Number of Pages

6

eISSN

1421-9964

ISSN

1015-3837

Location

Switzerland

Publisher

S. Karger

Language

eng

Peer Reviewed

Yes

Open Access

No

Acceptance Date

11/03/2013

External Author Affiliations

The University of Sydney; Sydney Ultrasound for Women; The University of Canterbury, NZ

Era Eligible

Yes

Medium

Print-Electronic

Journal

Fetal Diagnosis and Therapy