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Related Experiment Video

Updated: Mar 19, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

A Bock¹, R Geske², B Schnackenburg³

¹Abteilung Neuroradiologie, Klinik für Radiologie und Neuroradiologie (Chefarzt: Priv.-Doz. Dr. H. Lange), Klinikum Neubrandenburg, Germany.

Klinische Neuroradiologie

|June 21, 2016

Summary

This summary is machine-generated.

Cerebrospinal fluid (CSF) flow via the cerebral aqueduct can now be quantified using MRI. The interthalamic width of the third ventricle serves as a reference to define normal CSF stroke volume per cardiac cycle (SVcc).

Keywords:

Aqueduct Key Words: CSF dynamics MRI Normal values Phase contrast Quantification

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Last Updated: Mar 19, 2026

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Area of Science:

Neuroimaging
Fluid dynamics
Neurology

Context:

Cerebrospinal fluid (CSF) flow quantification via the cerebral aqueduct using 2D-phase-contrast MRI is valuable but lacks normative data.
Stroke volume of CSF per cardiac cycle (SVcc) is a key metric for assessing flow volume.
Establishing normative values for SVcc is crucial for clinical application of this non-invasive MRI technique.

Purpose:

To evaluate the interthalamic width of the third ventricle as a reference system for SVcc.
To define normal CSF flow through the cerebral aqueduct using MRI measurements.
To correlate SVcc with interthalamic width in a healthy patient cohort.

Summary:

A strong correlation (r=0.822) was found between SVcc and interthalamic width in 83 healthy patients.
Abnormal SVcc values were observed in patients with specific neurological conditions and heart rate variations.
A linear regression model (y = 22.2*x + 43.5) was established for all 107 patients to assess SVcc relative to interthalamic width.

Impact:

This study provides a method to differentiate between hyperdynamic, hypodynamic, and normodynamic CSF flow through the cerebral aqueduct.
The findings enable the definition of normal CSF flow parameters, enhancing clinical utility.
Future evaluations should incorporate additional imaging findings and heart rate for comprehensive assessment.