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Placenta microstructure and microcirculation imaging with diffusion MRI

Research output: Contribution to journalArticlepeer-review

Paddy J Slator, Jana Hutter, Laura McCabe, Ana Dos Santos Gomes, Anthony N Price, Eleftheria Panagiotaki, Mary A Rutherford, Joseph V Hajnal, Daniel C Alexander

Original languageEnglish
Pages (from-to)756-766
JournalMagnetic Resonance in Medicine
Volume80
Issue number2
Early online date11 Dec 2017
DOIs
Accepted/In press17 Nov 2017
E-pub ahead of print11 Dec 2017
PublishedAug 2018

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Abstract

PURPOSE: To assess which microstructural models best explain the diffusion-weighted MRI signal in the human placenta.

METHODS: The placentas of nine healthy pregnant subjects were scanned with a multishell, multidirectional diffusion protocol at 3T. A range of multicompartment biophysical models were fit to the data, and ranked using the Bayesian information criterion.

RESULTS: Anisotropic extensions to the intravoxel incoherent motion model, which consider the effect of coherent orientation in both microvascular structure and tissue microstructure, consistently had the lowest Bayesian information criterion values. Model parameter maps and model selection results were consistent with the physiology of the placenta and surrounding tissue.

CONCLUSION: Anisotropic intravoxel incoherent motion models explain the placental diffusion signal better than apparent diffusion coefficient, intravoxel incoherent motion, and diffusion tensor models, in information theoretic terms, when using this protocol. Future work will aim to determine if model-derived parameters are sensitive to placental pathologies associated with disorders, such as fetal growth restriction and early-onset pre-eclampsia. Magn Reson Med, 2018. © 2017 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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