Cerebrospinal fluid flow in normal beagle dogs analyzed using magnetic resonance imaging

Area of Science:

• Veterinary Neurology
• Medical Imaging
• Physiology

Background:

• Cerebrospinal fluid (CSF) flow disorders like hydrocephalus are prevalent in small dogs.
• Human studies link CSF flow abnormalities to disease using MRI, but canine data is scarce.
• Lack of standard reference data hinders diagnosis in veterinary medicine.

Purpose of the Study:

• To acquire normative CSF flow velocity data in healthy beagle dogs.
• To measure flow velocity in the cerebral aqueduct and subarachnoid space at the foramen magnum.
• To establish a baseline for canine CSF dynamics.

Main Methods:

• Utilized phase-contrast and time-spatial labeling inversion pulse MRI on six healthy beagles.
• Assessed CSF flow patterns and velocities in the cerebral aqueduct and foramen magnum.
• Analyzed flow rate variations using sagittal time-spatial labeling inversion pulse imaging.

Main Results:

• Observed bidirectional CSF flow in the ventral subarachnoid space and cerebral aqueduct throughout the cardiac cycle.
• Measured mean peak velocities: ventral subarachnoid space (1.39 ± 0.13 cm/s), dorsal subarachnoid space (0.32 ± 0.12 cm/s), and cerebral aqueduct (0.76 ± 0.43 cm/s).

Conclusions:

• Noninvasive MRI visualization of CSF flow is effective in dogs.
• Established a reference dataset for CSF flow peak velocities in healthy dogs.
• Provides essential data for diagnosing canine neurological disorders related to CSF dynamics.