A new MRI tag-based method to non-invasively visualize cerebrospinal fluid flow

Area of Science:

• Medical Imaging
• Neuroscience
• Fluid Dynamics

Background:

• Abnormal cerebrospinal fluid (CSF) dynamics can lead to serious neurological conditions such as hydrocephalus, loculated CSF, cerebellar ectopia, and hydrosyringomyelia.
• Non-invasive assessment of CSF flow between cranial and spinal compartments using magnetic resonance imaging (MRI) is clinically valuable for diagnosing these conditions.

Purpose of the Study:

• To demonstrate that a novel tag-based CSF imaging methodology, Time-STAMP, offers improved contrast compared to a commercially available application for assessing CSF flow.

Main Methods:

• A prospective study involving ten healthy adults examined with both Time-SLIP and Time-STAMP on 3T MRI scanners.
• Image contrast was calculated for untagged (dark) and flowing (bright) CSF.
• Statistical analysis included D'Agostino and Pearson normality test and Friedman's test with Dunn's correction.
• Additionally, 96 pediatric patients were evaluated using the Time-STAMP method.

Main Results:

• Time-STAMP consistently yielded higher image contrasts than Time-SLIP in healthy adults (p < 0.0001).
• The contrast improvement for untagged versus flowing CSF ranged from 15% to 34%.
• CSF flow between adjacent compartments was successfully visualized in both healthy adults and pediatric patients using Time-STAMP.

Conclusions:

• Time-STAMP provides superior image contrast for visualizing CSF flow compared to Time-SLIP.
• The technique maintains the ability to qualitatively assess CSF movement and flow between compartments.