Simultaneous diffusion MRI measurements from multiple perfused rat hippocampal slices.

Area of Science:

• Neuroscience
• Biophysics
• Medical Imaging

Background:

• Diffusion-weighted magnetic resonance (MR) imaging is crucial for detecting ischemic injury in nervous tissue.
• Rat brain slices offer a controlled model to study the biophysical basis of MR signal changes.

Purpose of the Study:

• To develop and validate a multislice perfusion chamber for simultaneous diffusion-weighted MR imaging of multiple rat hippocampal slices.
• To assess the stability and feasibility of using this system for studying acute changes in brain tissue.

Main Methods:

• A novel multislice perfusion chamber was designed to accommodate eight rat hippocampal slices.
• Diffusion-weighted MR images were acquired with a high signal-to-noise ratio (SNR) at b = 8080 s/mm(2).
• Multicomponent water diffusion properties were analyzed, and their stability over time was evaluated using ANOVA.

Main Results:

• The system achieved a sufficient SNR (48 +/- 3) for detailed diffusion analysis.
• Key diffusion parameters (f(fast), D(fast), D(slow)) were stable for at least 8 hours post-slice procurement (P > 0.05).
• This indicates the reliability of the method for longitudinal studies.

Conclusions:

• The developed multislice perfusion chamber is a viable tool for investigating diffusion changes in brain slices.
• This method allows for the simultaneous study of multiple tissue samples, enhancing experimental efficiency.
• It holds potential for examining the acute temporal evolution of diffusion changes following experimental perturbations in brain tissue.