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Three-dimensional ultrasound fetal lung volume measurement: a systematic study comparing the multiplanar method with the rotational (VOCAL) technique

Kalache, K.D., Espinoza, J., Chaiworapongsa, T., Londono, J., Schoen, M.L., Treadwell, M.C., Lee, W. and Romero, R. (2003) Three-dimensional ultrasound fetal lung volume measurement: a systematic study comparing the multiplanar method with the rotational (VOCAL) technique Ultrasound in Obstetrics and Gynecology, 21, (2), pp. 111-118. (doi:10.1002/uog.39).

Record type: Article


Objectives: This study was designed to compare a conventional multiplanar technique for three-dimensional (3D) ultrasound measurement of fetal lung volume with a rotational method using VOCALTM (Virtual Organ Computer-aided AnaLysis).
Methods: Thirty-two fetuses with a variety of conditions at risk for pulmonary hypoplasia were studied. 3D volume data sets of the fetal lungs were acquired using a commercially available ultrasound system. The right and left lung volumes were calculated separately using VOCAL and the multiplanar technique. The level of agreement between two independent observers in categorizing the 3D volume data set as measurable or non-measurable was determined. The interobserver and intermethod variabilities were also evaluated for both methods.
Results: The intermethod variability was excellent (correlation r = 0.93 and r = 0.96 for the left and right lung, respectively), and there was substantial agreement between the results of both approaches (limits of agreement - 4.4 to 8.9 and - 3.4 to 4.8 mL for the right and left lung, respectively). Fetal lung estimation with VOCAL had a significantly higher interobserver variability than the multiplanar technique. Interobserver agreement in categorizing lung volume data sets as measurable or non-measurable was lower when VOCAL was used.
Conclusion: Fetal lung volume measurements can be undertaken interchangeably using the multiplanar technique or the rotational method with VOCAL. However, the latter was less reproducible (lower degree of agreement and significantly higher interobserver variability) than the former.

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Published date: 2003
Keywords: lung volume, pulmonary hypoplasia, three-dimensional ultrasonography, VOCAL


Local EPrints ID: 25700
ISSN: 0960-7692
PURE UUID: 91b2d753-a0f2-4041-89eb-d5c6e0a7f036

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Date deposited: 19 Apr 2006
Last modified: 17 Jul 2017 16:09

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Author: K.D. Kalache
Author: J. Espinoza
Author: T. Chaiworapongsa
Author: J. Londono
Author: M.L. Schoen
Author: M.C. Treadwell
Author: W. Lee
Author: R. Romero

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