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Updated: Jun 21, 2025
High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
Published on: May 10, 2012
Synthetic MRI and MR Fingerprinting-Derived Relaxometry of Antenatal Human Brainstem Myelination: A Postmortem-Based
Victor U Schmidbauer1, Intesar-Victoria Malla Houech1,2,3, Jakob Malik1
1From the Department of Biomedical Imaging and Image-Guided Therapy (V.U.S., I.-V.M.H., J.M., M.L.W., R.M., P.K., I.P., C.M., G.O.D., A.K., F.P., M.S., T.D., N.A.G., D.P., G.K.), Medical University of Vienna, Vienna, Austria.
Quantitative MRI methods like Synthetic MR imaging and MR fingerprinting show promise for tracking fetal brain myelination. These techniques demonstrate good consistency and correlate with gestational age, aiding in the prenatal detection of developmental abnormalities.
Area of Science:
- Neuroimaging
- Developmental Neuroscience
- Radiology
Background:
- Prenatal assessment of fetal brain myelination is challenging with current radiologic methods.
- Quantitative Magnetic Resonance (MR) imaging offers novel relaxometric properties linked to myelin development.
- This study investigates advanced MR techniques for evaluating fetal myelination.
Purpose of the Study:
- To assess the capability of Synthetic MR imaging and MR fingerprinting (MRF) in tracking fetal myelin development.
- To analyze the consistency of results between Synthetic MR imaging and MRF.
- To explore the potential of these quantitative MR techniques for prenatal diagnosis.
Main Methods:
- Retrospective analysis of postmortem fetal brain MR data from 26 cases (15 weeks + 1 day to 32 weeks + 1 day gestational age).
- Quantitative T1 and T2 relaxation times were measured in the medulla oblongata and midbrain using Synthetic MR imaging and MR fingerprinting.
- Pearson correlations and intraclass correlation coefficients were used to analyze relationships with gestational age and assess modality consistency.
Main Results:
- Both Synthetic MR imaging and MR fingerprinting showed significant negative correlations between relaxation times and gestational age in both brain regions.
- Relaxation times decreased with increasing gestational age, indicating ongoing myelination.
- Good-to-excellent consistency (Intraclass Correlation Coefficients ranging from 0.661 to 0.920) was observed between the two MR modalities.
Conclusions:
- Synthetic MR imaging and MR fingerprinting provide consistent and reliable quantitative myelin measurements in fetal brains post-15 weeks gestational age.
- These quantitative MR imaging metrics strongly correlate with gestational age, suggesting their potential for identifying abnormal prenatal myelination.
- Advanced quantitative MR techniques hold promise for improving prenatal assessment of cerebral development.
