Advanced MRI in cerebral small vessel disease

Area of Science:

• Neurology
• Radiology
• Biomedical Engineering

Background:

• Cerebral small vessel disease (cSVD) is a primary contributor to stroke and dementia.
• Conventional neuroimaging methods have limitations in detecting early-stage cSVD.
• There is a need for advanced techniques to better understand cSVD pathophysiology and progression.

Purpose of the Study:

• To review recent advancements in advanced neuroimaging for cSVD.
• To highlight the clinical and research applications of these techniques.
• To discuss the potential of advanced MRI as surrogate endpoints in clinical trials.

Main Methods:

• Diffusion MRI for improved detection of tissue damage and monitoring progression.
• Quantitative MRI (iron, myelin imaging) for molecular-level tissue composition insights.
• Dynamic contrast-enhanced MRI and other advanced MRI methods to assess blood-brain barrier permeability and cerebrovascular reactivity.
• Ultrahigh field MRI (7T) for high-resolution imaging of cerebral vasculature and flow dynamics.

Main Results:

• Advanced structural imaging enhances detection of cSVD-related tissue damage, even in seemingly normal tissue.
• Quantitative MRI provides insights into the molecular basis of cSVD.
• Functional MRI techniques reveal dynamic vascular abnormalities relevant for research and early interventions.
• Ultrahigh field MRI offers detailed visualization of small cerebral arteries and blood flow.

Conclusions:

• Advanced MRI techniques provide novel pathophysiological insights into cSVD.
• These methods enable improved quantification of disease burden and progression.
• Advanced neuroimaging holds significant potential for clinical trials, aiding in the assessment of therapeutic mechanisms and efficacy through sensitive endpoints.