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Updated: Feb 21, 2026
Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images
Published on: November 20, 2015
Advantages of cortical surface reconstruction using submillimeter 7 T MEMPRAGE
Natalia Zaretskaya1, Bruce Fischl2, Martin Reuter3
1Centre for Integrative Neuroscience, University of Tuebingen, Tuebingen, Germany; Department of Psychology, University of Tübingen, Tübingen, Germany; Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA.
Higher resolution MRI scans improve the accuracy of cortical thickness measurements. Submillimeter resolution reduces partial volume effects, leading to more precise neuroimaging analysis for brain structure studies.
Area of Science:
- Neuroimaging
- Quantitative MRI
- Brain Anatomy
Background:
- Advances in MRI technology enable higher spatial resolution imaging.
- Demand for software to process high-resolution neuroimaging data is increasing.
- The impact of higher resolution on quantitative morphometric accuracy remains under investigation.
Purpose of the Study:
- To adapt the FreeSurfer pipeline for submillimeter resolution data.
- To quantify differences in cortical surface reconstruction at native vs. downsampled resolution.
- To assess the accuracy gains in cortical thickness estimation with higher resolution.
Main Methods:
- Adapted FreeSurfer for submillimeter (0.75 mm^3) isotropic resolution data.
- Processed data from 39 volunteers at native and downsampled (1 mm^3) resolutions.
- Quantified differences in mesh surface placement between resolutions.
Main Results:
- Cortical thickness estimates were generally thinner at native resolution.
- Specific regions (Cingulate, Calcarine, Central sulci) showed increased thickness estimates.
- Differences were attributed to reduced partial volume effects at higher resolution.
Conclusions:
- Submillimeter resolution improves the accuracy of cortical thickness measurements.
- Higher resolution MRI enhances quantitative morphometric neuroimaging.
- Reduced partial volume effects are key to improved accuracy at submillimeter resolution.
