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Updated: Feb 18, 2026
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Human Fetal Blood Flow Quantification with Magnetic Resonance Imaging and Motion Compensation
Published on: January 7, 2021
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Regional cerebral flow velocity waveforms in the human fetus
1Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut 06510.
Summary
This study analyzed fetal cerebral blood flow in 25 fetuses, revealing lower resistance in the intracerebellar artery compared to other brain regions. These findings highlight significant in utero differences in fetal regional cerebral blood flow.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Neurosonology
Background:
- Understanding fetal brain development and blood flow is crucial for identifying potential neurological issues.
- Regional variations in cerebral blood flow can indicate specific developmental trajectories or potential complications.
Purpose of the Study:
- To determine regional cerebral blood flow velocity waveforms in the human fetus.
- To quantify pulsatility index (PI) in the middle cerebral artery (MCA), vertebral artery (VA), and intracerebellar arteries (ICA).
Main Methods:
- Flow velocity waveforms were assessed using Doppler ultrasound in 25 fetuses (23-39 weeks' gestation).
- Pulsatility index (PI) was calculated for MCA, VA, and ICA.
- Technically acceptable waveforms were obtained in 20 fetuses.
Main Results:
- The pulsatility index (PI) was lowest for the intracerebellar artery (ICA) in all fetuses studied.
- No significant difference was found between the pulsatility indices of the vertebral artery (VA) and middle cerebral artery (MCA).
Conclusions:
- Significant fetal regional cerebral blood flow differences exist in utero.
- Intracerebellar arterial resistance is lower than in other measured brain regions, suggesting specific vascularization patterns.
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