Diffusion Weighted and Diffusion Tensor MRI in Pediatric Neuroimaging Including Connectomics: Principles and...

Area of Science:

• Neuroimaging
• Biophysics
• Pediatric Neuroscience

Background:

• Diffusion weighted MRI (DWI) and diffusion tensor imaging (DTI) provide unique insights into central nervous system white matter (WM) ultrastructure.
• These noninvasive MRI techniques utilize the Brownian motion of water molecules to probe tissue microstructure without contrast agents.

Purpose of the Study:

• To summarize the principles of DWI/DTI.
• To discuss the applications of DWI/DTI in pediatric neuroscience research.

Main Methods:

• DWI/DTI analyzes the 3D shape, direction, and magnitude of water diffusion.
• This process generates unique tissue contrasts reflecting axonal WM organization.

Main Results:

• DWI/DTI offers qualitative and quantitative data on WM ultrastructure.
• The techniques are sensitive to water molecule mobility within brain components.

Conclusions:

• DWI/DTI is a powerful tool for studying normal and anomalous brain development, including connectivity.
• Applications extend to the diagnosis and understanding of various WM diseases in children.