Clinical Feasibility of Structural and Functional MRI in Free-Breathing Neonates and Infants
© 2022 International Society for Magnetic Resonance in Medicine..
BACKGROUND: Evaluation of structural lung abnormalities with magnetic resonance imaging (MRI) has previously been shown to be predictive of clinical neonatal outcomes in preterm birth. MRI during free-breathing with phase-resolved functional lung (PREFUL) may allow for complimentary functional information without exogenous contrast.
PURPOSE: To investigate the feasibility of structural and functional pulmonary MRI in a cohort of neonates and infants with no cardiorespiratory disease. Macrovascular pulmonary blood flows were also evaluated.
STUDY TYPE: Prospective.
POPULATION: Ten term infants with no clinically defined cardiorespiratory disease were imaged. Infants recruited from the general population and neonatal intensive care unit (NICU) were studied.
FIELD STRENGTH/SEQUENCE: T1 -weighted VIBE, T2 -weighted BLADE uncorrected for motion. Ultrashort echo time (UTE) and 3D-flow data were acquired during free-breathing with self-navigation and retrospective reconstruction. Single slice 2D-gradient echo (GRE) images were acquired during free-breathing for PREFUL analysis. Imaging was performed at 3 T.
ASSESSMENT: T1 , T2 , and UTE images were scored according to the modified Ochiai scheme by three pediatric body radiologists. Ventilation/perfusion-weighted maps were extracted from free-breathing GRE images using PREFUL analysis. Ventilation and perfusion defect percent (VDP, QDP) were calculated from the segmented ventilation and perfusion-weighted maps. Time-averaged cardiac blood velocities from three-dimensional-flow were evaluated in major pulmonary arteries and veins.
STATISTICAL TEST: Intraclass correlation coefficient (ICC).
RESULTS: The ICC of replicate structural scores was 0.81 (95% CI: 0.45-0.95) across three observers. Elevated Ochiai scores, VDP, and QDP were observed in two NICU participants. Excluding these participants, mean ± standard deviation structural scores were 1.2 ± 0.8, while VDP and QDP were 1.0% ± 1.1% and 0.4% ± 0.5%, respectively. Main pulmonary arterial blood flows normalized to body surface area were 3.15 ± 0.78 L/min/m2.
DATA CONCLUSION: Structural and functional pulmonary imaging is feasible using standard clinical MRI hardware (commercial whole-body 3 T scanner, table spine array, and flexible thoracic array) in free-breathing infants.
EVIDENCE LEVEL: 2 TECHNICAL EFFICACY: Stage 1.
Errataetall: |
CommentIn: J Magn Reson Imaging. 2022 Jun;55(6):1708-1709. - PMID 35312209 |
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Medienart: |
E-Artikel |
Erscheinungsjahr: |
2022 |
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Erschienen: |
2022 |
Enthalten in: |
Zur Gesamtaufnahme - volume:55 |
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Enthalten in: |
Journal of magnetic resonance imaging : JMRI - 55(2022), 6 vom: 01. Juni, Seite 1696-1707 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Zanette, Brandon [VerfasserIn] |
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Links: |
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Themen: |
Blood flow |
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Anmerkungen: |
Date Completed 17.05.2022 Date Revised 21.05.2022 published: Print-Electronic CommentIn: J Magn Reson Imaging. 2022 Jun;55(6):1708-1709. - PMID 35312209 Citation Status MEDLINE |
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doi: |
10.1002/jmri.28165 |
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funding: |
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PPN (Katalog-ID): |
NLM338426949 |
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500 | |a CommentIn: J Magn Reson Imaging. 2022 Jun;55(6):1708-1709. - PMID 35312209 | ||
500 | |a Citation Status MEDLINE | ||
520 | |a © 2022 International Society for Magnetic Resonance in Medicine. | ||
520 | |a BACKGROUND: Evaluation of structural lung abnormalities with magnetic resonance imaging (MRI) has previously been shown to be predictive of clinical neonatal outcomes in preterm birth. MRI during free-breathing with phase-resolved functional lung (PREFUL) may allow for complimentary functional information without exogenous contrast | ||
520 | |a PURPOSE: To investigate the feasibility of structural and functional pulmonary MRI in a cohort of neonates and infants with no cardiorespiratory disease. Macrovascular pulmonary blood flows were also evaluated | ||
520 | |a STUDY TYPE: Prospective | ||
520 | |a POPULATION: Ten term infants with no clinically defined cardiorespiratory disease were imaged. Infants recruited from the general population and neonatal intensive care unit (NICU) were studied | ||
520 | |a FIELD STRENGTH/SEQUENCE: T1 -weighted VIBE, T2 -weighted BLADE uncorrected for motion. Ultrashort echo time (UTE) and 3D-flow data were acquired during free-breathing with self-navigation and retrospective reconstruction. Single slice 2D-gradient echo (GRE) images were acquired during free-breathing for PREFUL analysis. Imaging was performed at 3 T | ||
520 | |a ASSESSMENT: T1 , T2 , and UTE images were scored according to the modified Ochiai scheme by three pediatric body radiologists. Ventilation/perfusion-weighted maps were extracted from free-breathing GRE images using PREFUL analysis. Ventilation and perfusion defect percent (VDP, QDP) were calculated from the segmented ventilation and perfusion-weighted maps. Time-averaged cardiac blood velocities from three-dimensional-flow were evaluated in major pulmonary arteries and veins | ||
520 | |a STATISTICAL TEST: Intraclass correlation coefficient (ICC) | ||
520 | |a RESULTS: The ICC of replicate structural scores was 0.81 (95% CI: 0.45-0.95) across three observers. Elevated Ochiai scores, VDP, and QDP were observed in two NICU participants. Excluding these participants, mean ± standard deviation structural scores were 1.2 ± 0.8, while VDP and QDP were 1.0% ± 1.1% and 0.4% ± 0.5%, respectively. Main pulmonary arterial blood flows normalized to body surface area were 3.15 ± 0.78 L/min/m2 | ||
520 | |a DATA CONCLUSION: Structural and functional pulmonary imaging is feasible using standard clinical MRI hardware (commercial whole-body 3 T scanner, table spine array, and flexible thoracic array) in free-breathing infants | ||
520 | |a EVIDENCE LEVEL: 2 TECHNICAL EFFICACY: Stage 1 | ||
650 | 4 | |a Journal Article | |
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650 | 4 | |a lung | |
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