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DOI: 10.1148/radiol.2393050583
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Fetal Lung Volume Measurements: Determination with MR Imaging—Effect of Various Factors1

Valerie L. Ward, MD, MPH, Mizuki Nishino, MD, Hiroto Hatabu, MD, PhD, Judy A. Estroff, MD, Carol E. Barnewolt, MD, Henry A. Feldman, PhD and Deborah Levine, MD

1 From the Department of Radiology (V.L.W., J.A.E., C.E.B.), Advanced Fetal Care Center (V.L.W., J.A.E., C.E.B.), and Clinical Research Program (H.A.F.), Children's Hospital, and Department of Radiology, Beth Israel Deaconess Medical Center (M.N., H.H., D.L.), Harvard Medical School, 300 Longwood Ave, Boston, MA 02115. From the 2003 RSNA Annual Meeting. Received April 7, 2005; revision requested June 3; revision received August 29; accepted September 22; final version accepted November 1. Address correspondence to V.L.W. (e-mail: valerie.ward{at}childrens.harvard.edu).


Figure 1
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  		Figure 1: FLV measurement with MR imaging. Coronal half-Fourier single-shot turbo spin-echo MR image (echo time, 92 msec; section thickness, 5 mm; field of view, 32 x 32 cm; matrix, 256 x 256) of a fetus at 32 weeks GA in cephalic presentation shows a manually drawn free-form region of interest tracing around the visible portions of right and left lungs.

 

Figure 2
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  		Figure 2a: Graphs show measurements of FLV with MR imaging as a function of GA. MR imaging–based FLV measurements from 30 fetuses with GA of 17–36 weeks. For each fetus, measurements were obtained in duplicate by two observers in the (a) transverse, (b) sagittal, and (c) coronal planes. bullet = observer A, * = observer B. (d) Fitted quadratic functions for three MR imaging planes of measurement differed negligibly.

 

Figure 2
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  		Figure 2b: Graphs show measurements of FLV with MR imaging as a function of GA. MR imaging–based FLV measurements from 30 fetuses with GA of 17–36 weeks. For each fetus, measurements were obtained in duplicate by two observers in the (a) transverse, (b) sagittal, and (c) coronal planes. bullet = observer A, * = observer B. (d) Fitted quadratic functions for three MR imaging planes of measurement differed negligibly.

 

Figure 2
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  		Figure 2c: Graphs show measurements of FLV with MR imaging as a function of GA. MR imaging–based FLV measurements from 30 fetuses with GA of 17–36 weeks. For each fetus, measurements were obtained in duplicate by two observers in the (a) transverse, (b) sagittal, and (c) coronal planes. bullet = observer A, * = observer B. (d) Fitted quadratic functions for three MR imaging planes of measurement differed negligibly.

 

Figure 2
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  		Figure 2d: Graphs show measurements of FLV with MR imaging as a function of GA. MR imaging–based FLV measurements from 30 fetuses with GA of 17–36 weeks. For each fetus, measurements were obtained in duplicate by two observers in the (a) transverse, (b) sagittal, and (c) coronal planes. bullet = observer A, * = observer B. (d) Fitted quadratic functions for three MR imaging planes of measurement differed negligibly.

 




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