A diffusion tensor MRI atlas of the postmortem rhesus macaque brain

Area of Science:

• Neuroscience
• Primate Brain Imaging
• Neuroanatomy

Background:

• Rhesus macaques are crucial models for human brain studies.
• Magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) are vital for brain structure and function analysis.
• Existing rhesus brain atlases lack sufficient resolution and contrast.

Purpose of the Study:

• To develop a high-resolution MRI/DTI atlas of the rhesus macaque brain.
• To provide a detailed neuroanatomical resource for research.
• To overcome limitations of previous rhesus brain atlases.

Main Methods:

• Utilized 10 postmortem rhesus macaque brain specimens.
• Acquired high-resolution structural MRI and DTI data.
• Performed 3D segmentation of 241 anatomic structures and diffusion tractography.

Main Results:

• Generated a microscopic resolution MRI/DTI atlas of the rhesus brain.
• Included detailed 3D segmentation, diffusion tractography, cortical thickness, and variability maps.
• Incorporated established nomenclature and stereotaxic reference frames.

Conclusions:

• The new atlas offers superior resolution and contrast for rhesus brain research.
• This resource facilitates advanced studies in neuroanatomy, disease modeling, and aging.
• It serves as a valuable tool for comparative neuroscience and brain mapping.