Related Experiment Videos
Magnetic resonance demonstration of normal CSF flow
AJNR. American Journal of Neuroradiology
|January 1, 1986
Summary
The CSF flow-void sign, indicating cerebrospinal fluid (CSF) flow, appears in 67% of normal brain MRIs. Recognizing this normal finding is crucial to avoid misinterpreting it as a pathological condition.
Area of Science:
- Neuroradiology
- Medical Imaging
Background:
- Cerebrospinal fluid (CSF) dynamics are crucial for brain health.
- Understanding normal CSF flow patterns on magnetic resonance (MR) imaging is essential for accurate diagnosis.
Purpose of the Study:
- To investigate the appearance and incidence of flowing CSF in the brain using MR imaging.
- To identify and characterize the "CSF flow-void sign" on T2-weighted and T1-weighted spin-echo sequences.
Main Methods:
- Retrospective review of MR scans from 46 patients with normal examinations.
- Analysis of T2-weighted and T1-weighted spin-echo pulse sequences.
Main Results:
- The CSF flow-void sign was observed in 67% of patients in the aqueduct of Sylvius on T2-weighted images.
- This sign appeared in the caudal fourth ventricle (32%) and third ventricle (4%) on T2-weighted scans.
- The sign was less frequent on T1-weighted scans (13%).
Conclusions:
- The CSF flow-void sign likely represents pulsatile CSF flow.
- Recognizing this sign is important to differentiate normal CSF dynamics from potential pathologies.
- This finding may aid in evaluating CSF circulatory dynamics during routine MR examinations.