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Magnetic Resonance Imaging01:24

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Related Experiment Video

Updated: Jun 25, 2025

Diaphragmatic Ultrasound in Adults: Image Acquisition and Interpretation
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Quantifying Normal Diaphragmatic Motion and Shape and their Developmental Changes via Dynamic MRI.

You Hao, Jayaram K Udupa, Yubing Tong

    Medrxiv : the Preprint Server for Health Sciences
    |May 27, 2024
    PubMed
    Summary

    Dynamic MRI quantifies pediatric diaphragm motion and curvature, revealing age-related velocity changes and consistent curvature across genders. This provides new insights into diaphragm function.

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    Area of Science:

    • Respiratory Physiology
    • Medical Imaging
    • Pediatric Medicine

    Background:

    • The diaphragm is crucial for breathing, but detailed in-vivo motion data is scarce.
    • Quantitative descriptions of regional hemi-diaphragmatic motion and curvature are lacking.

    Approach:

    • Utilized free-breathing dynamic MRI (dMRI) on 177 healthy children.
    • Segmented hemi-diaphragm domes and selected 25 surface points for analysis.
    • Computed velocities and sagittal/coronal curvatures across 13 regions, analyzing age and gender variations.

    Key Points:

    • Observed diaphragm velocities from ~2mm/s to ~13mm/s.
    • Measured sagittal curvature from ~3m⁻¹ to ~27m⁻¹ and coronal curvature from ~6m⁻¹ to ~20m⁻¹.
    • Found no significant gender differences in velocity or curvature, but distinct age-related velocity patterns emerged between genders. Strong velocity correlation between homologous hemi-diaphragm regions.

    Conclusions:

    • Free-breathing dMRI enables quantitative assessment of 3D diaphragmatic motion and curvature.
    • This study reveals novel details on regional, inter-hemi-diaphragm, gender, and age-related variations in pediatric diaphragm dynamics and shape.