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Published in: Japanese Journal of Radiology 7/2018

01-07-2018 | Original Article

Magnetic resonance assessment of fetal lung maturity: comparison between signal intensity and volume measurement

Authors: Ryo Ogawa, Tomoyuki Kido, Masashi Nakamura, Teruhito Kido, Teruhito Mochizuki, Takashi Sugiyama

Published in: Japanese Journal of Radiology | Issue 7/2018

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Abstract

Purpose

We evaluated the associations between gestational age (GA) and lung-to-liver signal intensity ratio (LLSIR) and fetal lung volume (FLV) using magnetic resonance imaging (MRI). Moreover, we evaluated the reproducibility of these measurements.

Materials and methods

LLSIR and FLV were measured using single-shot fast spin-echo MRI in 88 consecutive fetuses. The Spearman test was used to assess the relationships between (1) LLSIR and GA, and (2) FLV and GA in 81 fetuses without lung abnormalities. Intra- and inter-observer reliabilities were assessed using intra-class correlation coefficients (ICCs).

Results

Overall, GA and LLSIR were significantly correlated (r = 0.62, p < 0.001). However, GA and LLSIR were only significantly correlated during the third trimester (before third trimester: r = 0.39, p = 0.08; during third trimester: r = 0.46, p < 0.001). Overall, GA and FLV were significantly correlated (r = 0.72, p < 0.001). FLV was significantly correlated with GA before (r = 0.86, p < 0.001) and during the third trimester (r = 0.47, p < 0.001). All ICCs were above 0.90.

Conclusions

LLSIR and FLV are useful for the assessment of fetal lung maturity and are highly reproducible. Before the third trimester, FLV is more suitable than LLSIR for the evaluation of fetal lung maturity.
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Metadata
Title
Magnetic resonance assessment of fetal lung maturity: comparison between signal intensity and volume measurement
Authors
Ryo Ogawa
Tomoyuki Kido
Masashi Nakamura
Teruhito Kido
Teruhito Mochizuki
Takashi Sugiyama
Publication date
01-07-2018
Publisher
Springer Japan
Published in
Japanese Journal of Radiology / Issue 7/2018
Print ISSN: 1867-1071
Electronic ISSN: 1867-108X
DOI
https://doi.org/10.1007/s11604-018-0745-0

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