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Maiuro A, Ercolani G, Di Stadio F, Antonelli A, Catalano C, Manganaro L, Capuani S. Two-Compartment Perfusion MR IVIM Model to Investigate Normal and Pathological Placental Tissue. J Magn Reson Imaging 2024; 59:879-891. [PMID: 37329218 DOI: 10.1002/jmri.28858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/18/2023] Open
Abstract
BACKGROUND Perfusion and diffusion coexist in the placenta and can be altered by pathologies. The two-perfusion model, where f1 and, f2 are the perfusion-fraction of the fastest and slowest perfusion compartment, respectively, and D is the diffusion coefficient, may help differentiate between normal and impaired placentas. PURPOSE Investigate the potential of the two-perfusion IVIM model in differentiating between normal and abnormal placentas. STUDY-TYPE Retrospective, case-control. POPULATION 43 normal pregnancy, 9 fetal-growth-restriction (FGR), 6 small-for-gestational-age (SGA), 4 accreta, 1 increta and 2 percreta placentas. FIELD STRENGTH/SEQUENCE Diffusion-weighted-echo planar imaging sequence at 1.5 T. ASSESSMENT Voxel-wise signal-correction and fitting-controls were used to avoid overfitting obtaining that two-perfusion model fitted the observed data better than the IVIM model (Akaike weight: 0.94). The two-perfusion parametric-maps were quantified from ROIs in the fetal and maternal placenta and in the accretion zone of accreta placentas. The diffusion coefficient D was evaluated using a b ≥ 200 sec/mm2 -mono-exponential decay fit. IVIM metrics were quantified to fix f1 + f2 = fIVIM . STATISTICAL-TESTS ANOVA with Dunn-Sidák's post-hoc correction and Cohen's d test were used to compare parameters between groups. Spearman's coefficient was evaluated to study the correlation between variables. A P-value<0.05 indicated a statistically significant difference. RESULTS There was a significant difference in f1 between FGR and SGA, and significant differences in f2 and fIVIM between normal and FGR. The percreta + increta group showed the highest f1 values (Cohen's d = -2.66). The f2 between normal and percreta + increta groups showed Cohen's d = 1.12. Conversely, fIVIM had a small effective size (Cohen's d = 0.32). In the accretion zone, a significant correlation was found between f2 and GA (ρ = 0.90) whereas a significant negative correlation was found between fIVIM and D (ρ = -0.37 in fetal and ρ = -0.56 in maternal side) and f2 and D (ρ = -0.38 in fetal and ρ = -0.51 in maternal side) in normal placentas. CONCLUSION The two-perfusion model provides complementary information to IVIM parameters that may be useful in identifying placenta impairment. LEVEL OF EVIDENCE 2 TECHNICAL EFFICACY STAGE: 1.
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Affiliation(s)
- Alessandra Maiuro
- Department of Physics, Sapienza University of Rome, Rome, Italy
- Physics Department Rome, CNR ISC Roma Sapienza, Rome, Italy
| | - Giada Ercolani
- Department of Radiological, Oncological and Pathological Sciences, Umberto I Hospital, Sapienza University of Rome, Rome, Italy
| | | | - Amanda Antonelli
- Department of Radiological, Oncological and Pathological Sciences, Umberto I Hospital, Sapienza University of Rome, Rome, Italy
| | - Carlo Catalano
- Department of Radiological, Oncological and Pathological Sciences, Umberto I Hospital, Sapienza University of Rome, Rome, Italy
| | - Lucia Manganaro
- Department of Radiological, Oncological and Pathological Sciences, Umberto I Hospital, Sapienza University of Rome, Rome, Italy
| | - Silvia Capuani
- Physics Department Rome, CNR ISC Roma Sapienza, Rome, Italy
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Turan OM, Babischkin JS, Aberdeen GW, Turan S, Pepe GJ, Albrecht ED. B-Flow/Spatiotemporal Image Correlation M-Mode and Contrast-Enhanced/Microbubble Ultrasonography Quantification of Spiral Artery Distensibility and Placental Intervillous Perfusion in the First Trimester in a Primate Model of Impaired Spiral Artery Remodeling. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:2557-2564. [PMID: 37749012 PMCID: PMC10591761 DOI: 10.1016/j.ultrasmedbio.2023.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 08/17/2023] [Accepted: 08/28/2023] [Indexed: 09/27/2023]
Abstract
OBJECTIVE During early human pregnancy, placental trophoblasts remodel spiral arteries into distensible low-resistance vessels to promote placental perfusion. We have established a model of impaired spiral artery remodeling (SAR) by elevating estradiol levels in the first trimester of baboon pregnancy. In the present study, B-flow/spatiotemporal image correlation (STIC) M-mode ultrasonography, a non-Doppler technology for sharp rendering of vessel dimensions, was used to determine whether spiral artery distensibility was altered in SAR-suppressed baboons. Contrast-enhanced ultrasound/microbubble imaging was also performed to determine whether it detected changes in placenta intervillous space perfusion in SAR-suppressed baboons. METHODS The two imaging procedures were performed in the first trimester in baboons not treated or treated with estradiol to suppress SAR. RESULTS Spiral artery distensibility, that is, luminal diameter at systole minus diameter at diastole, and volume flow as quantified by B-flow/STIC M-mode were 26% (p = 0.03) and 55% (p = 0.059) lower, respectively, in SAR-suppressed baboons. However, placental intervillous space flow rate and video intensity plateau levels reflecting blood perfusion, quantified by contrast-enhanced ultrasound/microbubble imaging, were unaltered in SAR-suppressed baboons. CONCLUSION The results indicate that B-flow/STIC M-mode ultrasonography provides a non-invasive method to detect reduced distensibility and, thus, function of spiral arteries across the cardiac cycle in the first trimester in a primate model of impaired SAR. This study represents a first step in determining whether B-flow/STIC M-mode detects a similar defect in SAR early in adverse human pregnancy. This would provide an avenue to develop therapeutic modalities to prevent the devastating consequences of impaired SAR.
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Affiliation(s)
- Ozhan M Turan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jeffery S Babischkin
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Graham W Aberdeen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sifa Turan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Gerald J Pepe
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Eugene D Albrecht
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA.
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Slator PJ, Cromb D, Jackson LH, Ho A, Counsell SJ, Story L, Chappell LC, Rutherford M, Hajnal JV, Hutter J, Alexander DC. Non-invasive mapping of human placenta microenvironments throughout pregnancy with diffusion-relaxation MRI. Placenta 2023; 144:29-37. [PMID: 37952367 DOI: 10.1016/j.placenta.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 10/13/2023] [Accepted: 11/01/2023] [Indexed: 11/14/2023]
Abstract
INTRODUCTION In-vivo measurements of placental structure and function have the potential to improve prediction, diagnosis, and treatment planning for a wide range of pregnancy complications, such as fetal growth restriction and pre-eclampsia, and hence inform clinical decision making, ultimately improving patient outcomes. MRI is emerging as a technique with increased sensitivity to placental structure and function compared to the current clinical standard, ultrasound. METHODS We demonstrate and evaluate a combined diffusion-relaxation MRI acquisition and analysis pipeline on a sizable cohort of 78 normal pregnancies with gestational ages ranging from 15 + 5 to 38 + 4 weeks. Our acquisition comprises a combined T2*-diffusion MRI acquisition sequence - which is simultaneously sensitive to oxygenation, microstructure and microcirculation. We analyse our scans with a data-driven unsupervised machine learning technique, InSpect, that parsimoniously identifies distinct components in the data. RESULTS We identify and map seven potential placental microenvironments and reveal detailed insights into multiple microstructural and microcirculatory features of the placenta, and assess their trends across gestation. DISCUSSION By demonstrating direct observation of micro-scale placental structure and function, and revealing clear trends across pregnancy, our work contributes towards the development of robust imaging biomarkers for pregnancy complications and the ultimate goal of a normative model of placental development.
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Affiliation(s)
- Paddy J Slator
- Cardiff University Brain Research Imaging Centre, School of Psychology, Maindy Road, Cardiff, CF24 4HQ, UK; School of Computer Science and Informatics, Cardiff University, Cardiff, UK; Centre for Medical Image Computing and Department of Computer Science, University College London, London, UK.
| | - Daniel Cromb
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Laurence H Jackson
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK; Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Alison Ho
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - Serena J Counsell
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Lisa Story
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - Lucy C Chappell
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - Mary Rutherford
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Joseph V Hajnal
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK; Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Jana Hutter
- Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK; Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK
| | - Daniel C Alexander
- Centre for Medical Image Computing and Department of Computer Science, University College London, London, UK
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Huda K, Lawrence DJ, Thompson W, Lindsey SH, Bayer CL. In vivo noninvasive systemic myography of acute systemic vasoactivity in female pregnant mice. Nat Commun 2023; 14:6286. [PMID: 37813833 PMCID: PMC10562381 DOI: 10.1038/s41467-023-42041-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 09/28/2023] [Indexed: 10/11/2023] Open
Abstract
Altered vasoactivity is a major characteristic of cardiovascular and oncological diseases, and many therapies are therefore targeted to the vasculature. Therapeutics which are selective for the diseased vasculature are ideal, but whole-body selectivity of a therapeutic is challenging to assess in practice. Vessel myography is used to determine the functional mechanisms and evaluate pharmacological responses of vascularly-targeted therapeutics. However, myography can only be performed on ex vivo sections of individual arteries. We have developed methods for implementation of spherical-view photoacoustic tomography for non-invasive and in vivo myography. Using photoacoustic tomography, we demonstrate the measurement of acute vascular reactivity in the systemic vasculature and the placenta of female pregnant mice in response to two vasodilators. Photoacoustic tomography simultaneously captures the significant acute vasodilation of major arteries and detects selective vasoactivity of the maternal-fetal vasculature. Photoacoustic tomography has the potential to provide invaluable preclinical information on vascular response that cannot be obtained by other established methods.
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Affiliation(s)
- Kristie Huda
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, USA
| | - Dylan J Lawrence
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, USA
- Photosound Technologies Inc., Houston, TX, USA
| | | | - Sarah H Lindsey
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - Carolyn L Bayer
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, USA.
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Hutter J, Slator PJ, Avena Zampieri C, Hall M, Rutherford M, Story L. Multi-modal MRI reveals changes in placental function following preterm premature rupture of membranes. Magn Reson Med 2023; 89:1151-1159. [PMID: 36255151 PMCID: PMC10091779 DOI: 10.1002/mrm.29483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 09/18/2022] [Accepted: 09/20/2022] [Indexed: 02/02/2023]
Abstract
PURPOSE Preterm premature rupture of membranes complicates up to 40% of premature deliveries. Fetal infection may occur in the absence of maternal symptoms, delaying diagnosis and increasing morbidity and mortality. A noninvasive antenatal assessment of early signs of placental inflammation is therefore urgently required. METHODS Sixteen women with preterm premature rupture of membranes < 34 weeks gestation and 60 women with uncomplicated pregnancies were prospectively recruited. A modified diffusion-weighted spin-echo single shot EPI sequence with a diffusion preparation acquiring 264 unique parameter combinations in < 9 min was obtained on a clinical 3 Tesla MRI scanner. The data was fitted to a 2-compartment T 2 * $$ {\mathrm{T}}_2^{\ast } $$ -intravoxel incoherent motion model comprising fast and slowly circulating fluid pools to obtain quantitative information on perfusion, density, and tissue composition. Z values were calculated, and correlation with time from between the rupture of membranes and the scan, gestational age at delivery, and time between scan and delivery assessed. RESULTS Placental T 2 * $$ {\mathrm{T}}_2^{\ast } $$ was significantly reduced in preterm premature rupture of membranes, and the 2-compartmental model demonstrated that this decline is mainly linked to the perfusion component observed in the placental parenchyma. Multi-modal MRI measurement of placental function is linked to gestational age at delivery and time from membrane rupture. CONCLUSION More complex models and data acquisition can potentially improve fitting of the underlying etiology of preterm birth compared with individual single-contrast models and contribute to additional insights in the future. This will need validation in larger cohorts. A multi-modal MRI acquisition between rupture of the membranes and delivery can be used to measure placental function and is linked to gestational age at delivery.
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Affiliation(s)
- Jana Hutter
- Centre for the Developing Brain, King's College London, London, United Kingdom.,Centre for Medical Engineering, King's College London, London, United Kingdom
| | | | - Carla Avena Zampieri
- Centre for the Developing Brain, King's College London, London, United Kingdom.,Centre for Medical Engineering, King's College London, London, United Kingdom
| | - Megan Hall
- Centre for the Developing Brain, King's College London, London, United Kingdom.,Institute for Women's and Children's Health, King's College London, London, United Kingdom.,Fetal Medicine Unit, St Thomas' Hospital, London, United Kingdom
| | - Mary Rutherford
- Centre for the Developing Brain, King's College London, London, United Kingdom.,Centre for Medical Engineering, King's College London, London, United Kingdom
| | - Lisa Story
- Centre for the Developing Brain, King's College London, London, United Kingdom.,Institute for Women's and Children's Health, King's College London, London, United Kingdom.,Fetal Medicine Unit, St Thomas' Hospital, London, United Kingdom
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Himoto Y, Fujimoto K, Kido A, Otani S, Matsumoto YK, Mogami H, Nakao KK, Kurata Y, Moribata Y, Chigusa Y, Minamiguchi S, Mandai M, Nakamoto Y. Risk Stratification for Pregnancies Diagnosed With Fetal Growth Restriction Based on Placental MRI. J Magn Reson Imaging 2022; 56:1650-1658. [PMID: 35713388 DOI: 10.1002/jmri.28298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/28/2022] [Accepted: 05/31/2022] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Diagnosis of fetal growth restriction (FGR) entails difficulties with differentiating fetuses not fulfilling their growth potential because of pathologic conditions, such as placental insufficiency, from constitutionally small fetuses. The feasibility of placental MRI for risk stratification among pregnancies diagnosed with FGR remains unexplored. PURPOSE To explore quantitative MRI features useful to identify pregnancies with unfavorable outcomes and to assess the diagnostic performance of visual analysis of MRI to detect pregnancies with unfavorable outcomes, among pregnancies diagnosed with FGR. STUDY TYPE Retrospective. POPULATION Thirteen pregnancies with unfavorable outcomes (preterm emergency cesarean section or intrauterine fetal death) and 11 pregnancies with favorable outcomes performed MRI at gestational weeks 21-36. FIELD STRENGTH/SEQUENCE A 5-T, half-Fourier-acquired single-shot turbo spin echo (HASTE), spin-echo echo-planar imaging (SE-EPI) and T2 map derived from SE-EPI. ASSESSMENT Placental size on HASTE sequences and T2 mapping-based histogram features were extracted. Three radiologists qualitatively evaluated the visibility of maternal cotyledon on HASTE and SE-EPI sequences with echo times (TEs) = 60, 90, and 120 msec using 3-point Likert scales: 0, absent; 1, equivocal; and 2, present. STATISTICAL TESTS Welch's t-test or Mann-Whitney U test for quantitative features between the favorable and unfavorable outcome groups. Areas under the receiver operating curves (AUCs) of the three readers' visual analyses to detect pregnancies with unfavorable outcomes. A P value of <0.05 was inferred as statistically significant. RESULTS Placental size (major and minor axis, estimated area of placental bed, and volume of placenta) and T2 mapping-based histogram features (mean, skewness, and kurtosis) were statistically significantly different between the two groups. Visual analysis of HASTE and SE-EPI with TE = 60 msec showed AUCs of 0.80-0.86 to detect pregnancies with unfavorable outcomes. DATA CONCLUSION Placental size, histogram features, and visual analysis of placental MRI may allow for risk stratification regarding outcomes among pregnancies diagnosed with FGR. EVIDENCE LEVEL 3 TECHNICAL EFFICACY: Stage 5.
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Affiliation(s)
- Yuki Himoto
- Department of Diagnostic Radiology and Nuclear Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Koji Fujimoto
- Department of Real World Data Research and Development, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Aki Kido
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Satoshi Otani
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuka Kuriyama Matsumoto
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Haruta Mogami
- Department of Gynecology and Obstetrics, Kyoto University, Kyoto, Japan
| | - Kyoko Kameyama Nakao
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasuhisa Kurata
- Department of Diagnostic Radiology and Nuclear Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Yusaku Moribata
- Preemptive Medicine and Lifestyle-related Disease Research Center, Kyoto University Hospital, Kyoto, Japan
| | | | | | - Masaki Mandai
- Department of Gynecology and Obstetrics, Kyoto University, Kyoto, Japan
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Gyselaers W, Lees C. Maternal Low Volume Circulation Relates to Normotensive and Preeclamptic Fetal Growth Restriction. Front Med (Lausanne) 2022; 9:902634. [PMID: 35755049 PMCID: PMC9218216 DOI: 10.3389/fmed.2022.902634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/04/2022] [Indexed: 11/13/2022] Open
Abstract
This narrative review summarizes current evidence on the association between maternal low volume circulation and poor fetal growth. Though much work has been devoted to the study of cardiac output and peripheral vascular resistance, a low intravascular volume may explain why high vascular resistance causes hypertension in women with preeclampsia (PE) that is associated with fetal growth restriction (FGR) and, at the same time, presents with normotension in FGR itself. Normotensive women with small for gestational age babies show normal gestational blood volume expansion superimposed upon a constitutionally low intravascular volume. Early onset preeclampsia (EPE; occurring before 32 weeks) is commonly associated with FGR, and poor plasma volume expandability may already be present before conception, thus preceding gestational volume expansion. Experimentally induced low plasma volume in rodents predisposes to poor fetal growth and interventions that enhance plasma volume expansion in FGR have shown beneficial effects on intrauterine fetal condition, prolongation of gestation and birth weight. This review makes the case for elevating the maternal intravascular volume with physical exercise with or without Nitric Oxide Donors in FGR and EPE, and evaluating its role as a potential target for prevention and/or management of these conditions.
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Affiliation(s)
- Wilfried Gyselaers
- Department of Obstetrics, Ziekenhuis Oost Limburg, Genk, Belgium.,Department of Physiology, Hasselt University, Hasselt, Belgium
| | - Christoph Lees
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, United Kingdom.,Department of Metabolism, Digestion and Reproduction, Institute for Reproductive and Developmental Biology, Imperial College London, London, United Kingdom.,Department of Development and Regeneration, KU Leuven, Leuven, Belgium.,Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, London, United Kingdom
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Antonelli A, Capuani S, Ercolani G, Dolciami M, Ciulla S, Celli V, Kuehn B, Piccioni MG, Giancotti A, Porpora MG, Catalano C, Manganaro L. Human placental microperfusion and microstructural assessment by intra-voxel incoherent motion MRI for discriminating intrauterine growth restriction: a pilot study. J Matern Fetal Neonatal Med 2022; 35:9667-9674. [PMID: 35291892 DOI: 10.1080/14767058.2022.2050365] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVES To evaluate the potential of Intravoxel Incoherent Motion (IVIM) Imaging in the quantification of placental micro-perfusion and microstructural features to identify and discriminate different forms of intrauterine growth restriction (IUGR) and normal fetuses pregnancies. METHODS Small for gestational age SGA (n = 8), fetal growth restriction FGR (n = 10), and normal (n = 49) pregnancies were included in the study. Placental Magnetic Resonance Imaging (MRI) was performed at 1.5 T using a diffusion-weighted sequence with 10 b-values. IVIM fractional perfusion (fp), diffusion (D), and pseudodiffusion (D*) were evaluated on the fetal and maternal placental sides. Correlations between IVIM parameters, Gestational Age (GA), Birth Weight (BW), and the presence or absence of prenatal fetoplacental Doppler abnormalities at the US were investigated in SGA, FGR, and normal placentae. RESULTS fp and D* of the placental fetal side discriminate between SGA and FGR (p = .021; p = .036, respectively), showing lower values in FGR. SGA showed an intermediate perfusion pattern in terms of fp and D* compared to FGR and normal controls. In the intrauterine growth restriction group (SGA + FGR), a significant positive correlation was found between fp and BW (p < .002) in the fetal placenta and a significant negative correlation was found between D and GA in both the fetal (p < .0009) and maternal (p < .006) placentas. CONCLUSIONS Perfusion IVIM parameters fp and D* may be useful to discriminate different micro-vascularization patterns in IUGR being helpful to detect microvascular subtle impairment even in fetuses without any sign of US Doppler impairment in utero. Moreover, fp may predict fetuses' body weight in intrauterine growth restriction pregnancies. The diffusion IVIM parameter D may reflect more rapid microstructural rearrangement of the placenta due to aging processes in the IUGR group than in normal controls.
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Affiliation(s)
- Amanda Antonelli
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Silvia Capuani
- Physics Department, CNR Institute for Complex Systems (ISC), "Sapienza" University of Rome, Rome, Italy
| | - Giada Ercolani
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Miriam Dolciami
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Sandra Ciulla
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Veronica Celli
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | | | - Maria Grazia Piccioni
- Department of Gynaecological-Obstetrical and Urological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Antonella Giancotti
- Department of Gynaecological-Obstetrical and Urological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Maria Grazia Porpora
- Department of Gynaecological-Obstetrical and Urological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Carlo Catalano
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Lucia Manganaro
- Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy
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Malmberg M, Kragsterman E, Sinding M, Hansen DN, Peters DA, Frøkjær JB, Petersen AC, Sørensen A. Perfusion fraction derived from IVIM analysis of diffusion-weighted MRI in the assessment of placental vascular malperfusion antenatally. Placenta 2022; 119:1-7. [DOI: 10.1016/j.placenta.2022.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 12/19/2021] [Accepted: 01/05/2022] [Indexed: 12/16/2022]
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Liu XL, Feng J, Huang CT, Mei YJ, Xu YK. Use of intravoxel incoherent motion MRI to assess placental perfusion in normal and Fetal Growth Restricted pregnancies on their third trimester. Placenta 2021; 118:10-15. [PMID: 34995915 DOI: 10.1016/j.placenta.2021.12.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 11/11/2021] [Accepted: 12/23/2021] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Intravoxel Incoherent Motion (IVIM) MRI is a non-invasive, in vivo techniques which can assess placental perfusion quantitatively, and be useful for evaluating placental microcirculation. Our primary aim was to investigate whether fetal growth restriction (FGR) pregnancies have different placental perfusion and diffusion compared with normal pregnancies using IVIM. A secondary aim was to investigate correlations between placental IVIM parameters and gestational age in normal pregnancy. METHODS This study population included 17 FGR pregnancies and 36 normal pregnancies between 28 + 3 to 38 + 0 weeks. All women underwent a MRI examination including an IVIM sequence with 9 b-values on a 3.0 T MRI system. The standard diffusion coefficeint (D), pseudodiffusion (D*) and perfusion fraction (f) were calculated. RESULTS Placental f was significantly lower in the FGR group than that in the normal group (33.96 ± 2.62(%) vs 38.48 ± 5.31(%), p = 0.002). Placental D and D* in two groups showed no statistical significance (P > 0.05). Placental f moderately increased with increasing gestational age in normal pregnancies (r = 0.411, p = 0.013), and there existed a negative correlation between D values and gestational age (r = -0.390, p = 0.019). DISCUSSION The f values are able to distinguish FGR from normal pregnancies. It can be uses as a feasible index to evaluate placenta perfusion. Gestational age-associated changes in placental IVIM parameters likely reveal trajectories of microvascular perfusion fraction and diffusion characteristics in the normal developing placenta.
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Affiliation(s)
- Xi-Long Liu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Jie Feng
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Chan-Tao Huang
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Ying-Jie Mei
- Philips Healthcare, Guangzhou, Guangdong, 510055, China
| | - Yi-Kai Xu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China.
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Slator PJ, Palombo M, Miller KL, Westin C, Laun F, Kim D, Haldar JP, Benjamini D, Lemberskiy G, de Almeida Martins JP, Hutter J. Combined diffusion-relaxometry microstructure imaging: Current status and future prospects. Magn Reson Med 2021; 86:2987-3011. [PMID: 34411331 PMCID: PMC8568657 DOI: 10.1002/mrm.28963] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 06/25/2021] [Accepted: 07/20/2021] [Indexed: 12/15/2022]
Abstract
Microstructure imaging seeks to noninvasively measure and map microscopic tissue features by pairing mathematical modeling with tailored MRI protocols. This article reviews an emerging paradigm that has the potential to provide a more detailed assessment of tissue microstructure-combined diffusion-relaxometry imaging. Combined diffusion-relaxometry acquisitions vary multiple MR contrast encodings-such as b-value, gradient direction, inversion time, and echo time-in a multidimensional acquisition space. When paired with suitable analysis techniques, this enables quantification of correlations and coupling between multiple MR parameters-such as diffusivity, T 1 , T 2 , and T 2 ∗ . This opens the possibility of disentangling multiple tissue compartments (within voxels) that are indistinguishable with single-contrast scans, enabling a new generation of microstructural maps with improved biological sensitivity and specificity.
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Affiliation(s)
- Paddy J. Slator
- Centre for Medical Image ComputingDepartment of Computer ScienceUniversity College LondonLondonUK
| | - Marco Palombo
- Centre for Medical Image ComputingDepartment of Computer ScienceUniversity College LondonLondonUK
| | - Karla L. Miller
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical NeurosciencesUniversity of OxfordOxfordUK
| | - Carl‐Fredrik Westin
- Department of RadiologyBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA
| | - Frederik Laun
- Institute of RadiologyUniversity Hospital ErlangenFriedrich‐Alexander‐Universität Erlangen‐Nürnberg (FAU)ErlangenGermany
| | - Daeun Kim
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
- Signal and Image Processing InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Justin P. Haldar
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
- Signal and Image Processing InstituteUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Dan Benjamini
- The Eunice Kennedy Shriver National Institute of Child Health and Human DevelopmentBethesdaMDUSA
- The Center for Neuroscience and Regenerative MedicineUniformed Service University of the Health SciencesBethesdaMDUSA
| | | | - Joao P. de Almeida Martins
- Division of Physical Chemistry, Department of ChemistryLund UniversityLundSweden
- Department of Radiology and Nuclear MedicineSt. Olav’s University HospitalTrondheimNorway
| | - Jana Hutter
- Centre for Biomedical EngineeringSchool of Biomedical Engineering and ImagingKing’s College LondonLondonUK
- Centre for the Developing BrainSchool of Biomedical Engineering and ImagingKing’s College LondonLondonUK
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12
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Slator PJ, Hutter J, Marinescu RV, Palombo M, Jackson LH, Ho A, Chappell LC, Rutherford M, Hajnal JV, Alexander DC. Data-Driven multi-Contrast spectral microstructure imaging with InSpect: INtegrated SPECTral component estimation and mapping. Med Image Anal 2021; 71:102045. [PMID: 33934005 PMCID: PMC8543043 DOI: 10.1016/j.media.2021.102045] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 02/08/2021] [Accepted: 03/16/2021] [Indexed: 11/19/2022]
Abstract
Unsupervised learning technique for spectroscopic analysis of quantitative MRI. Shares information across voxels to improve estimation of multi-dimensional or single-dimensional spectra. Spectral maps are dramatically improved compared to existing approaches. Can potentially identify and map tissue environments; in placental diffusion-relaxometry MRI we demonstrate that it identifies components that correspond to distinct tissue types.
We introduce and demonstrate an unsupervised machine learning technique for spectroscopic analysis of quantitative MRI experiments. Our algorithm supports estimation of one-dimensional spectra from single-contrast data, and multidimensional correlation spectra from simultaneous multi-contrast data. These spectrum-based approaches allow model-free investigation of tissue properties, but require regularised inversion of a Laplace transform or Fredholm integral, which is an ill-posed calculation. Here we present a method that addresses this limitation in a data-driven way. The algorithm simultaneously estimates a canonical basis of spectral components and voxelwise maps of their weightings, thereby pooling information across whole images to regularise the ill-posed problem. We show in simulations that our algorithm substantially outperforms current voxelwise spectral approaches. We demonstrate the method on multi-contrast diffusion-relaxometry placental MRI scans, revealing anatomically-relevant sub-structures, and identifying dysfunctional placentas. Our algorithm vastly reduces the data required to reliably estimate spectra, opening up the possibility of quantitative MRI spectroscopy in a wide range of new applications. Our InSpect code is available at github.com/paddyslator/inspect.
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Affiliation(s)
- Paddy J Slator
- Centre for Medical Image Computing, Department of Computer Science, University College London, UK.
| | - Jana Hutter
- Centre for the Developing Brain, Kings College London, London, UK; Biomedical Engineering Department, Kings College London, London, UK
| | - Razvan V Marinescu
- Centre for Medical Image Computing, Department of Computer Science, University College London, UK
| | - Marco Palombo
- Centre for Medical Image Computing, Department of Computer Science, University College London, UK
| | - Laurence H Jackson
- Centre for the Developing Brain, Kings College London, London, UK; Biomedical Engineering Department, Kings College London, London, UK
| | - Alison Ho
- Women's Health Department, King's College London, London, UK
| | - Lucy C Chappell
- Women's Health Department, King's College London, London, UK
| | - Mary Rutherford
- Centre for the Developing Brain, Kings College London, London, UK
| | - Joseph V Hajnal
- Centre for the Developing Brain, Kings College London, London, UK; Biomedical Engineering Department, Kings College London, London, UK
| | - Daniel C Alexander
- Centre for Medical Image Computing, Department of Computer Science, University College London, UK
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13
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Joosten L, Boss M, Jansen T, Brom M, Buitinga M, Aarntzen E, Eriksson O, Johansson L, de Galan B, Gotthardt M. Molecular Imaging of Diabetes. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00041-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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14
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Su L, Lin BR, Lin F, Tsui IK, Gaw SL, Janzen C, Sadda SR, Tsui I. Maternal Optical Coherence Tomography Angiography Changes Related to Small for Gestational Age Pregnancies. Transl Vis Sci Technol 2020; 9:4. [PMID: 33344048 PMCID: PMC7718826 DOI: 10.1167/tvst.9.13.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/14/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose To study maternal retinal changes in pregnancies that resulted in a small for gestational age (SGA) infant. Methods Pregnant women with SGA infants at birth and age-matched pregnant women with appropriate for gestational age (AGA) infants at birth (controls) were enrolled. All subjects underwent spectral domain optical coherent tomography angiography (OCTA) imaging using a 10° × 10° scan pattern centered on the fovea. Vessel density (VD) and vessel length density (VLD) of the superficial capillary plexus (SCP), intermediate capillary plexus (ICP), and deep capillary plexus (DCP) were analyzed and compared between the two groups. Results Twelve eyes of eight subjects with SGA infants and 64 eyes of 44 age-matched subjects with AGA infants were included in this study. There was no significant difference in chronic hypertension (P = 1.0), gestational hypertension (P = 1.0), type 1/2 diabetes (P = 1.0), gestational diabetes (P = 0.97), or preeclampsia (P = 0.50) between the SGA group and AGA group. There were significant increases in both VD and VLD in the SCP and ICP layers when comparing the SGA group with the AGA group (P < 0.05). Conclusions In this pilot study, subjects with SGA infants had increases in selective retinal vasculature layers that may represent systemic perfusion changes compensating for placental insufficiency. Translational Relevance Additional assessment of maternal retinal changes in pregnancy using OCTA could prove the technology useful as a biomarker of fetal morbidity.
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Affiliation(s)
- Li Su
- Doheny Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.,Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Benjamin R Lin
- Doheny Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Fei Lin
- Doheny Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Ilene K Tsui
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Stephanie L Gaw
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive Sciences at UCSF, San Francisco, CA, USA
| | - Carla Janzen
- Department of Obstetrics and Gynecology, UCLA, Los Angeles, CA, USA
| | - SriniVas R Sadda
- Doheny Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Irena Tsui
- Doheny Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.,Stein Eye Institute, Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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15
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Dellschaft NS, Hutchinson G, Shah S, Jones NW, Bradley C, Leach L, Platt C, Bowtell R, Gowland PA. The haemodynamics of the human placenta in utero. PLoS Biol 2020; 18:e3000676. [PMID: 32463837 PMCID: PMC7255609 DOI: 10.1371/journal.pbio.3000676] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/27/2020] [Indexed: 12/12/2022] Open
Abstract
We have used magnetic resonance imaging (MRI) to provide important new insights into the function of the human placenta in utero. We have measured slow net flow and high net oxygenation in the placenta in vivo, which are consistent with efficient delivery of oxygen from mother to fetus. Our experimental evidence substantiates previous hypotheses on the effects of spiral artery remodelling in utero and also indicates rapid venous drainage from the placenta, which is important because this outflow has been largely neglected in the past. Furthermore, beyond Braxton Hicks contractions, which involve the entire uterus, we have identified a new physiological phenomenon, the ‘utero-placental pump’, by which the placenta and underlying uterine wall contract independently of the rest of the uterus, expelling maternal blood from the intervillous space. MRI provides important new insights into the function of the human placenta, revealing slow net flow and high, uniform oxygenation in healthy pregnancies, detecting changes that will lead to compromised oxygen delivery to the fetus in preeclampsia, and identifying a new physiological phenomenon, the ‘utero-placental pump’.
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Affiliation(s)
- Neele S. Dellschaft
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
| | - George Hutchinson
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
| | - Simon Shah
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
| | - Nia W. Jones
- Department of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Chris Bradley
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
| | - Lopa Leach
- School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Craig Platt
- Nottingham University Hospitals NHS Trust and University of Nottingham, Nottingham, United Kingdom
| | - Richard Bowtell
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
| | - Penny A. Gowland
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom
- * E-mail:
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16
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Ho AEP, Hutter J, Jackson LH, Seed PT, Mccabe L, Al-Adnani M, Marnerides A, George S, Story L, Hajnal JV, Rutherford MA, Chappell LC. T2* Placental Magnetic Resonance Imaging in Preterm Preeclampsia: An Observational Cohort Study. HYPERTENSION (DALLAS, TEX. : 1979) 2020; 75:1523-1531. [PMID: 32336233 PMCID: PMC7682790 DOI: 10.1161/hypertensionaha.120.14701] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Placental dysfunction underlies the cause of pregnancies complicated by preeclampsia. The use of placental magnetic resonance imaging to provide an insight into the pathophysiology of preeclampsia and thus assess its potential use to inform prognosis and clinical management was explored. In this prospective observational cohort study, 14 women with preterm preeclampsia and 48 gestation-matched controls using 3-Tesla magnetic resonance imaging at median of 31.6 weeks (interquartile range [IQR], 28.6-34.6) and 32.2 weeks (IQR, 28.6-33.8), respectively, were imaged. The acquired data included T2-weighted images and T2* maps of the placenta, the latter an indicative measure of placental oxygenation. Placentae in women with preeclampsia demonstrated advanced lobulation, varied lobule sizes, high granularity, and substantial areas of low-signal intensity on T2-weighted imaging, with reduced entire placental mean T2* values for gestational age (2 sample t test, t=7.49) correlating with a reduction in maternal PlGF (placental growth factor) concentrations (Spearman rank correlation coefficient 0.76) and increased lacunarity values (t=3.26). Median mean T2* reduced from 67 ms (IQR, 54-73) at 26.0 to 29.8 weeks' gestation to 38 ms (IQR, 28-40) at 34.0 to 37.9 weeks' gestation in the control group. In women with preeclampsia, median T2* was 23 ms (IQR, 20-23) at 26.0 to 29.8 weeks' gestation and remained low (22 ms [IQR, 20-26] at 34.0-37.8 weeks' gestation). Histological features of maternal vascular malperfusion were only found in placentae from women with preeclampsia. Placental volume did not differ between the control group and women with preeclampsia. Placental magnetic resonance imaging allows both objective quantification of placental function in vivo and elucidation of the complex mechanisms underlying preeclampsia development.
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Affiliation(s)
- Alison E P Ho
- From the Department of Women and Children's Health, School of Life Course Sciences (A.E.P.H., P.S., L.S., L.C.C.), King's College London, United Kingdom
| | - Jana Hutter
- Centre for the Developing Brain (J.H., L.H.J., L.M., J.V.H., M.A.R.), King's College London, United Kingdom.,Biomedical Engineering Department (J.H., L.H.J., J.V.H.), King's College London, United Kingdom
| | - Laurence H Jackson
- Centre for the Developing Brain (J.H., L.H.J., L.M., J.V.H., M.A.R.), King's College London, United Kingdom.,Biomedical Engineering Department (J.H., L.H.J., J.V.H.), King's College London, United Kingdom
| | - Paul T Seed
- From the Department of Women and Children's Health, School of Life Course Sciences (A.E.P.H., P.S., L.S., L.C.C.), King's College London, United Kingdom
| | - Laura Mccabe
- Centre for the Developing Brain (J.H., L.H.J., L.M., J.V.H., M.A.R.), King's College London, United Kingdom
| | - Mudher Al-Adnani
- Department of Cellular Pathology, Guy's and St Thomas' Hospital, London, United Kingdom (M.A.-A., A.M., S.G.)
| | - Andreas Marnerides
- Department of Cellular Pathology, Guy's and St Thomas' Hospital, London, United Kingdom (M.A.-A., A.M., S.G.)
| | - Simi George
- Department of Cellular Pathology, Guy's and St Thomas' Hospital, London, United Kingdom (M.A.-A., A.M., S.G.)
| | - Lisa Story
- From the Department of Women and Children's Health, School of Life Course Sciences (A.E.P.H., P.S., L.S., L.C.C.), King's College London, United Kingdom
| | - Joseph V Hajnal
- Centre for the Developing Brain (J.H., L.H.J., L.M., J.V.H., M.A.R.), King's College London, United Kingdom.,Biomedical Engineering Department (J.H., L.H.J., J.V.H.), King's College London, United Kingdom
| | - Mary A Rutherford
- Centre for the Developing Brain (J.H., L.H.J., L.M., J.V.H., M.A.R.), King's College London, United Kingdom
| | - Lucy C Chappell
- From the Department of Women and Children's Health, School of Life Course Sciences (A.E.P.H., P.S., L.S., L.C.C.), King's College London, United Kingdom
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Andescavage N, You W, Jacobs M, Kapse K, Quistorff J, Bulas D, Ahmadzia H, Gimovsky A, Baschat A, Limperopoulos C. Exploring in vivo placental microstructure in healthy and growth-restricted pregnancies through diffusion-weighted magnetic resonance imaging. Placenta 2020; 93:113-118. [PMID: 32250735 PMCID: PMC7153576 DOI: 10.1016/j.placenta.2020.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/19/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Gross and microstructural changes in placental development can influence placental function and adversely impact fetal growth and well-being; however, there is a paucity of invivo tools available to reliably interrogate in vivo placental microstructural development. The objective of this study is to characterize invivo placental microstructural diffusion and perfusion in healthy and growth-restricted pregnancies (FGR) using non-invasive diffusion-weighted imaging (DWI). METHODS We prospectively enrolled healthy pregnant women and women whose pregnancies were complicated by FGR. Each woman underwent DWI-MRI between 18 and 40 weeks gestation. Placental measures of small (D) and large (D*) scale diffusion and perfusion (f) were estimated using the intra-voxel incoherent motion (IVIM) model. RESULTS We studied 137 pregnant women (101 healthy; 36 FGR). D and D* are increased in late-onset FGR, and the placental perfusion fraction, f, is decreased (p < 0.05 for all). DISCUSSION Placental DWI revealed microstructural alterations of the invivo placenta in FGR, particularly in late-onset FGR. Early and reliable identification of placental pathology in vivo may better guide future interventions.
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Affiliation(s)
- Nickie Andescavage
- Division of Neonatology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA; Department of Pediatrics, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Wonsang You
- Division of Diagnostic Imaging & Radiology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA
| | - Marni Jacobs
- Division of Biostatistics & Study Methodology, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA; Department of Pediatrics, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Kushal Kapse
- Division of Diagnostic Imaging & Radiology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA
| | - Jessica Quistorff
- Division of Diagnostic Imaging & Radiology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA
| | - Dorothy Bulas
- Division of Diagnostic Imaging & Radiology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA; Department of Radiology, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Homa Ahmadzia
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Alexis Gimovsky
- Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA
| | - Ahmet Baschat
- Department of Gynecology and Obstetrics, Johns Hopkins Center for Fetal Therapy, 600 North Wolfe Street, Nelson 228, Baltimore, MD, 21287, USA
| | - Catherine Limperopoulos
- Division of Diagnostic Imaging & Radiology, Children's National Hospital, 111 Michigan Ave, NW, Washington, DC, 20010, USA; Department of Pediatrics, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA; Department of Radiology, George Washington University School of Medicine, 2300 Eye St. NW, Washington, DC, 20052, USA.
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18
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Kristi B A, Ditte N H, Caroline H, Marianne S, Astrid P, Jens B F, David A P, Anne S. Placental diffusion-weighted MRI in normal pregnancies and those complicated by placental dysfunction due to vascular malperfusion. Placenta 2020; 91:52-58. [PMID: 32174307 DOI: 10.1016/j.placenta.2020.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/19/2020] [Accepted: 01/21/2020] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Our aim was to assess placental function by diffusion-weighted magnetic resonance imaging (MRI) using intravoxel incoherent motion (IVIM) analysis in uncomplicated pregnancies and pregnancies complicated by placental dysfunction. METHODS 31 normal pregnancies and 9 pregnancies complicated by placental dysfunction (birthweight ≤ -2SD and histological signs of placental vascular malperfusion) were retrieved from our placental MRI research database. MRI was performed at gestational weeks 20.1-40.6 in a 1.5 T system using 10 b-values (0-1000 s/mm2). Regions of interest were drawn covering the entire placenta in five transverse slices. Diffusion coefficient (D), pseudodiffusion coefficient (D*) and perfusion fraction (f) were estimated by IVIM analysis. RESULTS In normal pregnancies, placental f decreased linearly with gestational age (r = -0.522, p = 0.002) being 26.2% at week 20 and 18.8% at week 40. D and D* were 1.57 ± 0.03 and 31.7 ± 3.1 mm2/s (mean ± SD), respectively, and they were not correlated with gestational age. In complicated pregnancies, f was significantly reduced (mean Z-score = -1.16; p = 0.02) when compared to the group of normal pregnancies, whereas D and D* did not differ significantly between groups. Subgroup analysis demonstrated that f was predominantly reduced in dysfunctional placentas characterized by fetal vascular malperfusion (mean Z-score = -2.11, p < 0.001) rather than maternal vascular malperfusion (mean Z-score = -0.40, p = 0.42). In addition, f was negatively correlated with uterine artery pulsatility index (r = -0.396, p = 0.01). DISCUSSION Among parameters obtained by the IVIM analysis, only f revealed significant differences between the normal and the dysfunctional placentas. Subgroup analysis suggests that placental f may be able to discriminate non-invasively between different histological types of vascular malperfusion.
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Affiliation(s)
- Anderson Kristi B
- Department of Pathology, Aalborg University Hospital, Ladegaardsgade 3, 9000, Aalborg, Denmark.
| | - Hansen Ditte N
- Department of Obstetrics and Gynecology, Aalborg University Hospital, Reberbansgade 15, 9000, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Sdr. Skovvej 15, 9000, Aalborg, Denmark
| | - Haals Caroline
- Department of Obstetrics and Gynecology, Aalborg University Hospital, Reberbansgade 15, 9000, Aalborg, Denmark
| | - Sinding Marianne
- Department of Obstetrics and Gynecology, Aalborg University Hospital, Reberbansgade 15, 9000, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Sdr. Skovvej 15, 9000, Aalborg, Denmark
| | - Petersen Astrid
- Department of Pathology, Aalborg University Hospital, Ladegaardsgade 3, 9000, Aalborg, Denmark
| | - Frøkjær Jens B
- Department of Clinical Medicine, Aalborg University, Sdr. Skovvej 15, 9000, Aalborg, Denmark; Department of Radiology, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark
| | - Peters David A
- Department of Clinical Engineering, Central Denmark Region, Nørrebrogade 44, 8000, Aarhus C, Denmark
| | - Sørensen Anne
- Department of Obstetrics and Gynecology, Aalborg University Hospital, Reberbansgade 15, 9000, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Sdr. Skovvej 15, 9000, Aalborg, Denmark
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19
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Görkem SB, Coşkun A, Eşlik M, Kütük MS, Öztürk A. Diffusion-weighted imaging of placenta in intrauterine growth restriction with worsening Doppler US findings. ACTA ACUST UNITED AC 2020; 25:280-284. [PMID: 31120426 DOI: 10.5152/dir.2019.18358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
PURPOSE We aimed to compare the placental diffusion difference between intrauterine growth restriction (IUGR) patients with worsening Doppler ultrasonography (US) findings and control group with normal Doppler US findings by using diffusion-weighted imaging (DWI). METHODS We performed a prospective study to compare the placental diffusion difference in 63 patients (gestational week, 28-34 weeks), including 50 IUGR patients (mean gestational week, 30 weeks 3 days ±16.2 days) with worsening Doppler US findings and 13 patients with normal Doppler US findings (mean gestational week, 29 weeks 4 days ±12.3 days) by using DWI (b value, 0-1000 s/mm2). We classified IUGR patients into three groups according to the reference values of the umbilical artery pulsatility index (PI) chart. Placenta apparent diffusion coefficient (ADC) calculations were performed by freehand drawn regions-of-interest (ROIs) (min, 8.04 cm2; max, 200 cm2). RESULTS Placental ADC values in IUGR patients (mean, 1.624±0.181 ×10-³ mm²/s; range, 1.35-1.96 ×10-3 mm2/s) were significantly reduced compared with the control group (mean, 1.827±0.191 ×10-³ mm²/s; range, 1.35-2.84 ×10-3 mm2/s) (P = 0.001). For adjusted ROI area calculation, ADC values were significantly lower in groups 3, 2 and 1, respectively, compared with the control group (P < 0.05); and there was no significant difference between groups 1 and 2 (P > 0.05). Preeclampsia significantly reduced the placental diffusion compared with patients without preeclampsia (P = 0.003). Gestational aging did not significantly affect ADC values in control patients (r=0.08, P = 0.561). The sensitivity, specificity, negative and positive predictive values of ADC to detect IUGR were 72%, 84.6%, 44%, and 94.7% with a cutoff value of 1.727 ×10-3 mm2/s, respectively. CONCLUSION The diagnostic estimation of placental ADC values to predict the severity of IUGR is comparable to that of umbilical artery PI. Considering that at the very early onset of IUGR, placental diffusion diminishes, ADC as a marker for IUGR in lieu of umbilical artery PI has the potential to determine the threshold for decreased placental diffusion. Therefore, DWI should be added to routine fetal MRI to show diffusion changes in placenta.
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Affiliation(s)
- Süreyya Burcu Görkem
- Division of Pediatric Radiology, Department of Radiology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Abdulhakim Coşkun
- Division of Pediatric Radiology, Department of Radiology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Murside Eşlik
- Department of Obstetrics and Gynaecology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Mehmet Serdar Kütük
- Department of Obstetrics and Gynaecology, Erciyes University School of Medicine, Kayseri, Turkey
| | - Ahmet Öztürk
- Department of Biostatistics, Erciyes University School of Medicine, Kayseri, Turkey
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Abstract
In utero diffusion magnetic resonance imaging (MRI) provides unique opportunities to noninvasively study the microstructure of tissue during fetal development. A wide range of developmental processes, such as the growth of white matter tracts in the brain, the maturation of placental villous trees, or the fibers in the fetal heart remain to be studied and understood in detail. Advances in fetal interventions and surgery furthermore increase the need for ever more precise antenatal diagnosis from fetal MRI. However, the specific properties of the in utero environment, such as fetal and maternal motion, increased field-of-view, tissue interfaces and safety considerations, are significant challenges for most MRI techniques, and particularly for diffusion. Recent years have seen major improvements, driven by the development of bespoke techniques adapted to these specific challenges in both acquisition and processing. Fetal diffusion MRI, an emerging research tool, is now adding valuable novel information for both research and clinical questions. This paper will highlight specific challenges, outline strategies to target them, and discuss two main applications: fetal brain connectomics and placental maturation.
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21
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Magnetic Resonance Imaging in Pregnancy with Intrauterine Growth Restriction: A Pilot Study. DISEASE MARKERS 2019; 2019:4373490. [PMID: 31827633 PMCID: PMC6881754 DOI: 10.1155/2019/4373490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 10/22/2019] [Indexed: 11/30/2022]
Abstract
Objective Intrauterine growth restriction (IUGR) is a major cause of late stillbirth, though not all compromised babies remain small or are considered growth restricted as pregnancy progresses. Fetal Magnetic Resonance Imaging (f-MRI) represents a second-line tool to study pregnancies with IUGR fetuses. The aim of our study was to evaluate the usefulness of f-MRI on predicting fetal growth and the offspring's perinatal respiratory outcome. Design All f-MRI performed between 2014 and 2016 in Siena were analysed. Pregnancies with IUGR (Study group (SG)) were recruited together with a control population (Control group (CG)), coupled for gestational age (GA) at the time of f-MRI (mean GA 31 wks). Neonatal information was collected. The f-MRI protocol consisted of T2w images. Six regions of interest (ROI) were placed as follows: 2 on the lung, 2 on the liver, and 2 on the amniotic fluid. The signal intensities (SI) of each ROI were measured. The SI lung to liver ratio (SI lung/liver) and SI lung to amniotic fluid ratio (SI lung/amniotic fluid) were obtained for each fetus. Each ratio was compared between SG and CG. Therefore, SG was divided into two subgroups: adequate and small for gestational age (AGA and SGA) newborns. All measurements were related to offspring's perinatal respiratory outcome. Results SI lung/liver was linearly related with GA at the time of f-MRI and with EFW. SI lung/amniotic fluid was significantly higher in SG than in CG (p = 0,014). In contrast, among SG, lower values of SI lung/amniotic fluid were found in the SGA compared to AGA (p = 0,036). The days of oxygen supply were higher in the SGA subgroup than in the AGA subgroup (p = 0,028). Conclusions SI lung/liver increases with fetal lung maturation and appears to be useful to estimate intrauterine fetal growth. SI lung/amniotic fluid seems to be a reliable predictive index to distinguish the IUGR fetuses that can recover their growth from those that were born SGA. f-MRI represents a promising frontier to predict IUGR fetus outcome, thus contributing to ameliorate the perinatal management.
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22
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Affiliation(s)
- Sarosh Rana
- From the Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of Chicago, IL (S.R.)
| | - Elizabeth Lemoine
- Harvard Medical School, Boston, MA (E.L.)
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA (E.L., S.A.K.)
| | - Joey P. Granger
- Department of Physiology, University of Mississippi Medical Center, Jackson (J.P.G.)
| | - S. Ananth Karumanchi
- Departments of Medicine, Obstetrics and Gynecology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA (S.A.K.)
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA (E.L., S.A.K.)
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23
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Slator PJ, Hutter J, Palombo M, Jackson LH, Ho A, Panagiotaki E, Chappell LC, Rutherford MA, Hajnal JV, Alexander DC. Combined diffusion-relaxometry MRI to identify dysfunction in the human placenta. Magn Reson Med 2019; 82:95-106. [PMID: 30883915 PMCID: PMC6519240 DOI: 10.1002/mrm.27733] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 01/04/2019] [Accepted: 01/27/2019] [Indexed: 12/25/2022]
Abstract
Purpose A combined diffusion‐relaxometry MR acquisition and analysis pipeline for in vivo human placenta, which allows for exploration of coupling between T2* and apparent diffusion coefficient (ADC) measurements in a sub 10‐minute scan time. Methods We present a novel acquisition combining a diffusion prepared spin echo with subsequent gradient echoes. The placentas of 17 pregnant women were scanned in vivo, including both healthy controls and participants with various pregnancy complications. We estimate the joint T2*‐ADC spectra using an inverse Laplace transform. Results T2*‐ADC spectra demonstrate clear quantitative separation between normal and dysfunctional placentas. Conclusions Combined T2*‐diffusivity MRI is promising for assessing fetal and maternal health during pregnancy. The T2*‐ADC spectrum potentially provides additional information on tissue microstructure, compared to measuring these two contrasts separately. The presented method is immediately applicable to the study of other organs.
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Affiliation(s)
- Paddy J Slator
- Centre for Medical Image Computing and Department of Computer Science, University College London, London, United Kingdom
| | - Jana Hutter
- Biomedical Engineering Department, King's College London, London, United Kingdom.,Centre for the Developing Brain, King's College London, London, United Kingdom
| | - Marco Palombo
- Centre for Medical Image Computing and Department of Computer Science, University College London, London, United Kingdom
| | - Laurence H Jackson
- Biomedical Engineering Department, King's College London, London, United Kingdom.,Centre for the Developing Brain, King's College London, London, United Kingdom
| | - Alison Ho
- Women's Health Department, King's College London, London, United Kingdom
| | - Eleftheria Panagiotaki
- Centre for Medical Image Computing and Department of Computer Science, University College London, London, United Kingdom
| | - Lucy C Chappell
- Women's Health Department, King's College London, London, United Kingdom
| | - Mary A Rutherford
- Centre for the Developing Brain, King's College London, London, United Kingdom
| | - Joseph V Hajnal
- Biomedical Engineering Department, King's College London, London, United Kingdom.,Centre for the Developing Brain, King's College London, London, United Kingdom
| | - Daniel C Alexander
- Centre for Medical Image Computing and Department of Computer Science, University College London, London, United Kingdom
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24
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Ludwig KD, Fain SB, Nguyen SM, Golos TG, Reeder SB, Bird IM, Shah DM, Wieben OE, Johnson KM. Perfusion of the placenta assessed using arterial spin labeling and ferumoxytol dynamic contrast enhanced magnetic resonance imaging in the rhesus macaque. Magn Reson Med 2019; 81:1964-1978. [PMID: 30357902 PMCID: PMC6715150 DOI: 10.1002/mrm.27548] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 08/29/2018] [Accepted: 09/03/2018] [Indexed: 01/01/2023]
Abstract
PURPOSE To investigate the correspondence between arterial spin labeling (ASL) flow-sensitive alternating inversion recovery (FAIR) and ferumoxytol DCE MRI for the assessment of placental intervillous perfusion. METHODS Ten pregnant macaques in late second trimester were imaged at 3 T using a 2D ASL FAIR, with and without outer-volume saturation pulses used to control the bolus width, and a 3D ferumoxytol DCE-MRI acquisition. The ASL tagged/control pairs were averaged, subtracted, and normalized to create perfusion ratio maps. Contrast arrival time and uptake slope were estimated by fitting the DCE data to a sigmoid function. Macaques (N = 4) received interleukin-1β to induce inflammation and disrupt perfusion. RESULTS The FAIR tag modification with outer-volume saturation reduced the median ASL ratio percentage compared with conventional FAIR (0.64% ± 1.42% versus 0.71% ± 2.00%; P < .05). Extended ferumoxytol arrival times (34 ± 25 seconds) were observed across the placenta. No significant DCE signal change was measured in fetal tissue ( - 0.6% ± 3.0%; P = .52) or amniotic fluid (1.9% ± 8.8%; P = .59). High ASL ratio was significantly correlated with early arrival time and high uptake slope (P < .05), but ASL signal was not above noise in late-DCE-enhancing regions. No significant differences were observed in perfusion measurements between the interleukin-1β and controls (P > .05). CONCLUSION The ASL-FAIR and ferumoxytol DCE-MRI methods are feasible to detect early blood delivery to the macaque placenta. Outer volume saturation reduced the high macrovascular ASL signal. Interleukin-1β exposure did not alter placental intervillous perfusion. An endogenous-labeling perfusion technique is limited due to extended transit times for flow within the placenta beyond the immediate vicinity of the maternal spiral arteries.
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Affiliation(s)
- Kai D. Ludwig
- Medical Physics, University of Wisconsin, 1111 Highland Ave, Madison, Madison, WI, USA 53705
| | - Sean B. Fain
- Medical Physics, University of Wisconsin, 1111 Highland Ave, Madison, Madison, WI, USA 53705
- Radiology, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
- Biomedical Engineering, University of Wisconsin, 1415 Engineering Dr, Madison, Madison, WI, USA 53706
| | - Sydney M. Nguyen
- Wisconsin National Primate Research Center, 1220 Capitol Court, Madison, WI, USA 53715
- Obstetrics and Gynecology, University of Wisconsin, 600 Highland Ave, Madison, WI, USA 53792
| | - Thaddeus G. Golos
- Wisconsin National Primate Research Center, 1220 Capitol Court, Madison, WI, USA 53715
- Obstetrics and Gynecology, University of Wisconsin, 600 Highland Ave, Madison, WI, USA 53792
- Comparative Biosciences, University of Wisconsin, 2015 Linden Dr, Madison, Madison, WI, USA 53706
| | - Scott B. Reeder
- Medical Physics, University of Wisconsin, 1111 Highland Ave, Madison, Madison, WI, USA 53705
- Radiology, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
- Biomedical Engineering, University of Wisconsin, 1415 Engineering Dr, Madison, Madison, WI, USA 53706
- Medicine, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
- Emergency Medicine, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
| | - Ian M. Bird
- Obstetrics and Gynecology, University of Wisconsin, 600 Highland Ave, Madison, WI, USA 53792
| | - Dinesh M. Shah
- Obstetrics and Gynecology, University of Wisconsin, 600 Highland Ave, Madison, WI, USA 53792
| | - Oliver E. Wieben
- Medical Physics, University of Wisconsin, 1111 Highland Ave, Madison, Madison, WI, USA 53705
- Radiology, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
| | - Kevin M. Johnson
- Medical Physics, University of Wisconsin, 1111 Highland Ave, Madison, Madison, WI, USA 53705
- Radiology, University of Wisconsin, 600 Highland Ave, Madison, Madison, WI, USA 53792
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25
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Slator PJ, Hutter J, McCabe L, Gomes ADS, Price AN, Panagiotaki E, Rutherford MA, Hajnal JV, Alexander DC. Placenta microstructure and microcirculation imaging with diffusion MRI. Magn Reson Med 2018; 80:756-766. [PMID: 29230859 PMCID: PMC5947291 DOI: 10.1002/mrm.27036] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/14/2017] [Accepted: 11/17/2017] [Indexed: 12/30/2022]
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 80:756-766, 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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Affiliation(s)
- Paddy J. Slator
- Centre for Medical Image Computing and Department of Computer ScienceUniversity College LondonLondonUK
| | - Jana Hutter
- Centre for the Developing Brain, King's College LondonLondonUK,Biomedical Engineering DepartmentKing's College LondonLondonUK
| | - Laura McCabe
- Centre for the Developing Brain, King's College LondonLondonUK
| | | | - Anthony N. Price
- Centre for the Developing Brain, King's College LondonLondonUK,Biomedical Engineering DepartmentKing's College LondonLondonUK
| | - Eleftheria Panagiotaki
- Centre for Medical Image Computing and Department of Computer ScienceUniversity College LondonLondonUK
| | | | - Joseph V. Hajnal
- Centre for the Developing Brain, King's College LondonLondonUK,Biomedical Engineering DepartmentKing's College LondonLondonUK
| | - Daniel C. Alexander
- Centre for Medical Image Computing and Department of Computer ScienceUniversity College LondonLondonUK
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26
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Wu C, Bayer CL. Imaging placental function: current technology, clinical needs, and emerging modalities. ACTA ACUST UNITED AC 2018; 63:14TR01. [DOI: 10.1088/1361-6560/aaccd9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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27
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Fu L, Zhang J, Xiong S, Sun M. Decreased apparent diffusion coefficient in the placentas of monochorionic twins with selective intrauterine growth restriction. Placenta 2018; 69:26-31. [PMID: 30213481 DOI: 10.1016/j.placenta.2018.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/23/2018] [Accepted: 07/05/2018] [Indexed: 01/08/2023]
Abstract
OBJECTIVES The apparent diffusion coefficient (ADC) was associated with the onset of intrauterine growth restriction in singleton pregnancies. However, the correlation of ADC with selective intrauterine growth restriction (sIUGR) of monochorionic (MC) twin pregnancies remained unknown. In this study, we aimed to evaluate the association of ADC with sIUGR in MC twin pregnancies by exploring diffusion weighted MR imaging (DWI). METHODS Fifty-one MC twin pregnancies, consisting 19 cases of sIUGR and 32 cases without sIUGR, were re-analyzed by DWI. ADCs were quantitated from two regions of interest, surrounding the insertion of the umbilical cord of placenta for each twin. A rADC (ADClarger twin/ADCsmaller twin) in each placenta was also evaluated. Then ADCs and rADCs were compared between cases with and without sIUGR. RESULTS The ADC in cases with sIUGR was significantly decreased compared with cases without sIUGR (1.846 × 103 vs 2.471 × 103 mm2/s, p < 0.001). The rADC in cases with sIUGR was significantly increased (1.346 vs 1.053, p < 0.001). CONCLUSIONS The ADC decreases and the rADC increases in the placentas of MC twins with sIUGR, suggesting that diffusion in the placenta is restricted in pregnancies with sIUGR.
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Affiliation(s)
- Le Fu
- Department of Radiology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, PR China
| | - Jun Zhang
- Department of Radiology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, PR China
| | - Shiyi Xiong
- Fetal Medicine Unit & Prenatal Diagnosis Centre, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, PR China
| | - Minghua Sun
- Department of Radiology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, PR China.
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28
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Jakab A, Tuura RL, Kottke R, Ochsenbein-Kölble N, Natalucci G, Nguyen TD, Kellenberger C, Scheer I. Microvascular perfusion of the placenta, developing fetal liver, and lungs assessed with intravoxel incoherent motion imaging. J Magn Reson Imaging 2017; 48:214-225. [PMID: 29281153 DOI: 10.1002/jmri.25933] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 12/07/2017] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND In utero intravoxel incoherent motion magnetic resonance imaging (IVIM-MRI) provides a novel method for examining microvascular perfusion fraction and diffusion in the developing human fetus. PURPOSE To characterize gestational changes in the microvascular perfusion fraction of the placenta, fetal liver, and lungs using IVIM-MRI. STUDY TYPE Retrospective, cross-sectional study. SUBJECTS Fifty-five datasets from 33 singleton pregnancies were acquired (17-36 gestational weeks). FIELD STRENGTH/SEQUENCE In utero diffusion-weighted echo-planar imaging at 1.5T and 3.0T with b-factors ranging from 0 to 900 s/mm2 in 16 steps. ASSESSMENT Using the IVIM principle, microvascular perfusion fraction (f), pseudodiffusion (D*), and diffusion coefficients (d) were estimated for the placenta, liver, and lungs with a biexponential model. A free-form nonlinear deformation algorithm was used to correct for the frame-by-frame motion of the fetal organs and the placenta. The IVIM parameters were then compared to a Doppler ultrasound-based assessment of the umbilical artery resistance index. STATISTICAL TESTS Pearson product-moment correlation coefficient (PMCC) to reveal outlier corrected correlations between Doppler and IVIM parameters. Gestational age-related changes were assessed using linear regression analysis (LR). RESULTS Placental f (0.29 ± 0.08) indicates high blood volume in the microvascular compartment, moderately increased during gestation (LR, R = 0.338), and correlated negatively with the umbilical artery resistance index (PMCC, R = -0.457). The f of the liver decreased sharply during gestation (LR, R = -0.436). Lung maturation was characterized by increasing perfusion fraction (LR, R = 0.547), and we found no gestational changes in d and D* values (LR, R = -0.013 and R = 0.051, respectively). The Doppler measurements of the umbilical artery and middle cerebral artery did not correlate with the IVIM parameters of the lungs and liver. DATA CONCLUSION Gestational age-associated changes of the placental, liver, and lung IVIM parameters likely reflect changes in placental and fetal circulation, and characterize the trajectory of microstructural and functional maturation of the fetal vasculature. LEVEL OF EVIDENCE 2 Technical Efficacy: Stage 3 J. Magn. Reson. Imaging 2017.
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Affiliation(s)
- András Jakab
- Center for MR-Research, University Children's Hospital, Zurich, Switzerland.,Computational Imaging Research Lab (CIR), Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Austria
| | - Ruth L Tuura
- Center for MR-Research, University Children's Hospital, Zurich, Switzerland
| | - Raimund Kottke
- Department of Diagnostic Imaging, University Children's Hospital, Zurich, Switzerland
| | | | - Giancarlo Natalucci
- Department of Neonatology, University Hospital and University of Zurich, Switzerland
| | - Thi Dao Nguyen
- Department of Neonatology, University Hospital and University of Zurich, Switzerland
| | | | - Ianina Scheer
- Department of Diagnostic Imaging, University Children's Hospital, Zurich, Switzerland
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29
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Kutuk MS, Sahin M, Gorkem SB, Doganay S, Ozturk A. Relationship between Doppler findings and fetal brain apparent diffusion coefficient in early-onset intra-uterine growth restriction. J Matern Fetal Neonatal Med 2017; 31:3201-3208. [DOI: 10.1080/14767058.2017.1369519] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mehmet Serdar Kutuk
- Department of Obstetrics and Gynecology, Erciyes Üniversitesi, Faculty of Medicine, Kayseri, Turkey
| | - Murside Sahin
- Department of Obstetrics and Gynecology, Erciyes Üniversitesi, Faculty of Medicine, Kayseri, Turkey
| | - Sureyya Burcu Gorkem
- Department of Radiology, Erciyes Üniversitesi, Faculty of Medicine, Pediatric Radiology Division, Kayseri, Turkey
| | - Selim Doganay
- Department of Radiology, Erciyes Üniversitesi, Faculty of Medicine, Pediatric Radiology Division, Kayseri, Turkey
| | - Ahmet Ozturk
- Department of Biostatistics, Faculty of Medicine, Erciyes Üniversitesi, Kayseri, Turkey
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30
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You W, Andescavage N, Zun Z, Limperopoulos C. Semi-automatic segmentation of the placenta into fetal and maternal compartments using intravoxel incoherent motion MRI. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2017; 10137:1013726. [PMID: 28947842 PMCID: PMC5609721 DOI: 10.1117/12.2254610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Intravoxel incoherent motion (IVIM) magnetic resonance imaging is an emerging non-invasive technique that has been recently applied to quantify in vivo global placental perfusion. We propose a robust semi-automated method for segmenting the placenta into fetal and maternal compartments from IVIM data, using a multi-label image segmentation algorithm called 'GrowCut'. Placental IVIM data were acquired on a 1.5T scanner from 16 healthy pregnant women between 21-37 gestational weeks. The voxel-wise perfusion fraction was then estimated after non-rigid image registration. The seed regions of the fetal and maternal compartments were determined using structural T2-weighted reference images, and improved progressively through an iterative process of the GrowCut algorithm to accurately encompass fetal and maternal compartments. We demonstrated that the placental perfusion fraction decreased in both fetal (-0.010/week) and maternal compartments (-0.013/week) while their relative difference (ffetal-fmaternal) gradually increased with advancing gestational age (+0.003/week, p=0.065). Our preliminary results show that the proposed method was effective in distinguishing placental compartments using IVIM.
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Affiliation(s)
- Wonsang You
- Dept. of Diagnostic Imaging and Radiology, Children’s National Medical Center, Washington, DC, USA
| | - Nickie Andescavage
- Dept. of Diagnostic Imaging and Radiology, Children’s National Medical Center, Washington, DC, USA
- Dept. of Neonatology, Children’s National Medical Center, Washington, DC, USA
| | - Zungho Zun
- Dept. of Diagnostic Imaging and Radiology, Children’s National Medical Center, Washington, DC, USA
| | - Catherine Limperopoulos
- Dept. of Diagnostic Imaging and Radiology, Children’s National Medical Center, Washington, DC, USA
- Dept. of Fetal and Transitional Medicine, Children’s National Medical Center, Washington, DC, USA
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31
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Decreased Brain and Placental Perfusion in Omphalopagus Conjoined Twins on Fetal MRI. Radiol Res Pract 2016; 2016:9458540. [PMID: 27034830 PMCID: PMC4791498 DOI: 10.1155/2016/9458540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 02/10/2016] [Indexed: 11/17/2022] Open
Abstract
The aim of this study is to evaluate perfusional changes in brain and placenta of omphalopagus conjoined twins and to compare them with singleton fetuses by using diffusion weighted imaging and apparent diffusion coefficient. Fetal MRIs of 28-week-old omphalopagus conjoined twins with a shared liver with two separate gallbladders and portal and hepatic venous systems and three singleton fetuses with unilateral borderline ventriculomegaly at the same gestational week as control group were enrolled retrospectively. There was a significant decrease in ADC values of brain regions (p = 0.018) and placenta (p = 0.005) of conjoined twins compared to the control group. The decreased ADC values in placenta and brain regions in conjoined twins might be due to decreased placental perfusion compared to singleton pregnancy. Our results would be a keystone for future studies which will compare larger group of monochorionic multiple pregnancies with singleton pregnancies.
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Ohgiya Y, Nobusawa H, Seino N, Miyagami O, Yagi N, Hiroto S, Munechika J, Hirose M, Takeyama N, Ohike N, Matsuoka R, Sekizawa A, Gokan T. MR Imaging of Fetuses to Evaluate Placental Insufficiency. Magn Reson Med Sci 2015; 15:212-9. [PMID: 26607809 PMCID: PMC5600058 DOI: 10.2463/mrms.mp.2015-0051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Purpose: To evaluate morphological and signal intensity (SI) changes of placental insufficiency on magnetic resonance imaging (MRI) and to assess morphological changes and decreased flow voids (FVs) on T2-weighted rapid acquisition with relaxation enhancement (RARE) images for diagnosing placental insufficiency. Methods: Fifty singleton fetuses underwent MRI using a 1.5-T MR scanner. Placental thickness, area, volume, SI, amniotic fluid SI, and size of FVs between the uterus and the placenta were measured on MR images. Two radiologists reviewed T2-weighted RARE images for globular appearance of the placenta and FVs between the uterus and the placenta. Data were analyzed using t-tests, McNemar’s tests, and areas under the receiver operating characteristic curve (AUCs) at 5% level of significance. Results: Twenty-five of the 50 pregnancies were categorized as having an insufficient placenta. Significant differences were observed between insufficient and normal placentas in mean placental thickness, area, volume, placenta to amniotic fluid SI ratio, and size of FVs (49.0 mm vs. 36.9 mm, 1.62 × 104 mm2 vs. 2.67 × 104 mm2, 5.13 × 105 mm3 vs. 6.56 × 105 mm3, 0.549 vs. 0.685, and 3.4 mm vs. 4.3 mm, respectively). The sensitivity and accuracy using globular appearance plus decreased FVs were greater than those using decreased FVs (P < 0.01). There was no significant difference among AUCs using globular appearance and decreased FVs, and globular appearance plus decreased FVs. Conclusions: Placental insufficiency was associated with placental thickness, area, volume, placenta to amniotic fluid SI ratio, and size of FVs. Evaluating FVs on T2-weighted RARE images can be useful for detecting placental insufficiency, particularly in placentas without globular appearance on MR images.
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33
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Siauve N, Chalouhi GE, Deloison B, Alison M, Clement O, Ville Y, Salomon LJ. Functional imaging of the human placenta with magnetic resonance. Am J Obstet Gynecol 2015; 213:S103-14. [PMID: 26428488 DOI: 10.1016/j.ajog.2015.06.045] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/15/2015] [Accepted: 06/17/2015] [Indexed: 11/29/2022]
Abstract
Abnormal placentation is responsible for most failures in pregnancy; however, an understanding of placental functions remains largely concealed from noninvasive, in vivo investigations. Magnetic resonance imaging (MRI) is safe in pregnancy for magnetic fields of up to 3 Tesla and is being used increasingly to improve the accuracy of prenatal imaging. Functional MRI (fMRI) of the placenta has not yet been validated in a clinical setting, and most data are derived from animal studies. FMRI could be used to further explore placental functions that are related to vascularization, oxygenation, and metabolism in human pregnancies by the use of various enhancement processes. Dynamic contrast-enhanced MRI is best able to quantify placental perfusion, permeability, and blood volume fractions. However, the transplacental passage of Gadolinium-based contrast agents represents a significant safety concern for this procedure in humans. There are alternative contrast agents that may be safer in pregnancy or that do not cross the placenta. Arterial spin labeling MRI relies on magnetically labeled water to quantify the blood flows within the placenta. A disadvantage of this technique is a poorer signal-to-noise ratio. Based on arterial spin labeling, placental perfusion in normal pregnancy is 176 ± 91 mL × min(-1) × 100 g(-1) and decreases in cases with intrauterine growth restriction. Blood oxygen level-dependent and oxygen-enhanced MRIs do not assess perfusion but measure the response of the placenta to changes in oxygen levels with the use of hemoglobin as an endogenous contrast agent. Diffusion-weighted imaging and intravoxel incoherent motion MRI do not require exogenous contrast agents, instead they use the movement of water molecules within tissues. The apparent diffusion coefficient and perfusion fraction are significantly lower in placentas of growth-restricted fetuses when compared with normal pregnancies. Magnetic resonance spectroscopy has the ability to extract information regarding metabolites from the placenta noninvasively and in vivo. There are marked differences in all 3 metabolites N-acetyl aspartate/choline levels, inositol/choline ratio between small, and adequately grown fetuses. Current research is focused on the ability of each fMRI technique to make a timely diagnosis of abnormal placentation that would allow for appropriate planning of follow-up examinations and optimal scheduling of delivery. These research programs will benefit from the use of well-defined sequences, standardized imaging protocols, and robust computational methods.
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Affiliation(s)
- Nathalie Siauve
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France; EA FETUS and LUMIERE Unit, Université Paris-Descartes, Paris, France; Hôpital Européen Georges Pompidou, Paris, France
| | - Gihad E Chalouhi
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France; EA FETUS and LUMIERE Unit, Université Paris-Descartes, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France
| | - Benjamin Deloison
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France; EA FETUS and LUMIERE Unit, Université Paris-Descartes, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France
| | - Marianne Alison
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France
| | - Olivier Clement
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France; Hôpital Européen Georges Pompidou, Paris, France
| | - Yves Ville
- EA FETUS and LUMIERE Unit, Université Paris-Descartes, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France
| | - Laurent J Salomon
- INSERM, U970, Sorbonne Paris Cite, Paris Cardiovascular Research Center-PARCC, Paris, France; EA FETUS and LUMIERE Unit, Université Paris-Descartes, Paris, France; Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France.
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Jin C, Londono I, Mallard C, Lodygensky GA. New means to assess neonatal inflammatory brain injury. J Neuroinflammation 2015; 12:180. [PMID: 26407958 PMCID: PMC4583178 DOI: 10.1186/s12974-015-0397-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 09/10/2015] [Indexed: 01/23/2023] Open
Abstract
Preterm infants are especially vulnerable to infection-induced white matter injury, associated with cerebral palsy, cognitive and psychomotor impairment, and other adverse neurological outcomes. The etiology of such lesions is complex and multifactorial. Furthermore, timing and length of exposure to infection also influence neurodevelopmental outcomes. Different mechanisms have been posited to mediate the observed brain injury including microglial activation followed by subsequent release of pro-inflammatory species, glutamate-induced excitotoxicity, and vulnerability of developing oligodendrocytes to cerebral insults. The prevalence of such neurological impairments requires an urgent need for early detection and effective neuroprotective strategies. Accordingly, noninvasive methods of monitoring disease progression and therapy effectiveness are essential. While diagnostic tools using biomarkers from bodily fluids may provide useful information regarding potential risks of developing neurological diseases, the use of magnetic resonance imaging/spectroscopy has emerged as a promising candidate for such purpose. Various pharmacological agents have demonstrated protective effects in the immature brain in animal models; however, few studies have progressed to clinical trials with promising results.
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Affiliation(s)
- Chen Jin
- Department of Pediatrics, Sainte-Justine Hospital and Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada.
| | - Irene Londono
- Department of Pediatrics, Sainte-Justine Hospital and Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada.
| | - Carina Mallard
- Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, 405 30, Gothenburg, Sweden.
| | - Gregory A Lodygensky
- Department of Pediatrics, Sainte-Justine Hospital and Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada. .,Montreal Heart Institute, 5000 Rue Bélanger, Montréal, Québec, Canada. .,Department of Neuroscience and Pharmacology, Université de Montréal, Montréal, Québec, Canada.
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