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High-resolution In Vivo Manual Segmentation Protocol for Human Hippocampal Subfields Using 3T Magnetic Resonance Imaging
Published on: November 10, 2015
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Structural connectivity mapping in human hippocampal-subfields using super-resolution hybrid diffusion imaging: a
Nahla M H Elsaid1,2, Pierrick Coupé3, Andrew J Saykin4,5
1Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA. nahla.elsaid@yale.edu.
Neuroradiology
|May 13, 2022
Summary
New hybrid diffusion imaging (HYDI) MRI methods reveal reduced structural integrity in the hippocampus of older adults. This finding offers a new framework for studying brain aging and dementia.
Area of Science:
- Neuroimaging
- Gerontology
- Structural MRI
Background:
- Aging affects cognitive functions, with the hippocampus being particularly vulnerable.
- Understanding age-related changes in hippocampal connectivity is crucial for diagnosing and treating neurodegenerative diseases.
Purpose of the Study:
- Introduce a novel super-resolution hybrid diffusion imaging (HYDI) methodology for hippocampus-aging research.
- Utilize HYDI MRI to investigate age-related alterations in hippocampal structure and connectivity.
Main Methods:
- Acquired HYDI diffusion data from young and older healthy adults.
- Transformed data into super-resolution images for detailed hippocampal subfield analysis.
- Examined correlations between age, hippocampal subfield connectivity, and whole-brain connectivity.
Main Results:
- Older adults exhibited reduced structural integrity in tractography streamlines between hippocampal subfields compared to younger adults.
- Demonstrated age-related decline in the structural connectivity within the hippocampus.
Conclusions:
- The developed HYDI MRI methodology provides a promising framework for aging and hippocampus studies.
- Findings open avenues for future research into the relationship between hippocampal connectivity and dementia.
