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Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

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Updated: Oct 20, 2025

Human Fetal Blood Flow Quantification with Magnetic Resonance Imaging and Motion Compensation

Human Fetal Blood Flow Quantification with Magnetic Resonance Imaging and Motion Compensation

Published on: January 7, 2021

Mapping Human Fetal Brain Maturation In Vivo Using Quantitative MRI.

V U Schmidbauer¹, G O Dovjak¹, M S Yildirim¹

¹From the Departments of Biomedical Imaging and Image-Guided Therapy (V.U.S., G.O.D., M.S.Y., M.W., M.C.D., F.P., R.-I.M., M.S., D.P. G.K).

AJNR. American Journal of Neuroradiology

|September 10, 2021

Summary

This summary is machine-generated.

SyMRI imaging allows for qualitative assessment of fetal brain maturation and quantitative measurement of myelin development in the brain stem. This technique shows promise for evaluating fetal brain development despite motion limitations.

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Published on: August 1, 2022

Area of Science:

Radiology
Neuroscience
Medical Imaging

Background:

SyMRI (Synthetic MRI) provides quantitative tissue-specific imaging data from a single acquisition.
Fetal brain maturation involves complex structural and biochemical changes, including myelination.

Purpose of the Study:

To evaluate the feasibility of SyMRI for assessing fetal brain maturation.
To compare SyMRI-based qualitative and quantitative assessments with conventional MRI.

Main Methods:

Retrospective analysis of 52 fetal MRI scans using SyMRI postprocessing.
Qualitative scoring of fetal brain maturity and quantitative measurement of myelin-related parameters (T1/T2 relaxation times, proton density).
Correlation analysis between gestational age and maturity scores/quantitative measurements.

Main Results:

SyMRI provided sufficient image quality in 23.08% of cases (23-34 weeks gestation).
SyMRI-based maturity scores strongly correlated with gestational age (r=0.915), similar to conventional MRI (r=0.966).
T2 relaxation time and rate in the medulla oblongata significantly correlated with gestational age, reflecting myelination.

Conclusions:

SyMRI enables qualitative assessment of fetal brain maturity and quantitative characterization of prenatal myelination.
Fetal motion is a limitation, but SyMRI offers novel possibilities for evaluating fetal brain development.