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

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:55

Enthalten in:

Journal of magnetic resonance imaging : JMRI - 55(2022), 6 vom: 01. Juni, Seite 1696-1707

Sprache:

Englisch

Beteiligte Personen:

Zanette, Brandon [VerfasserIn]
Schrauben, Eric M [VerfasserIn]
Munidasa, Samal [VerfasserIn]
Goolaub, Datta S [VerfasserIn]
Singh, Anuradha [VerfasserIn]
Coblentz, Ailish [VerfasserIn]
Stirrat, Elaine [VerfasserIn]
Couch, Marcus J [VerfasserIn]
Grimm, Robert [VerfasserIn]
Voskrebenzev, Andreas [VerfasserIn]
Vogel-Claussen, Jens [VerfasserIn]
Seethamraju, Ravi T [VerfasserIn]
Macgowan, Christopher K [VerfasserIn]
Greer, Mary-Louise C [VerfasserIn]
Tam, Emily W Y [VerfasserIn]
Santyr, Giles [VerfasserIn]

Links:

Volltext

Themen:

Blood flow
Free-breathing
Function
Infants
Journal Article
Lung
Research Support, Non-U.S. Gov't
Structure

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

doi:

10.1002/jmri.28165

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM338426949