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The contribution of voxel-based morphometry in staging patients with mild cognitive impairment
- Publication Year :
- 2006
-
Abstract
- Objective: To assess whether different patterns of regional gray matter loss in patients with mild cognitive impairment (MCI) are associated with different risks of conversion to Alzheimer disease (AD), using MRI and voxel-based morphometry (VBM). Methods: The authors recruited 22 patients with MCI, 22 patients with probable AD, and 20 healthy subjects (HS). T1 volumes from each subject were postprocessed according to an optimized VBM protocol. All patients were clinically followed up (mean [SD] time = 28.7 [5.7] months), and patients with MCI were reclassified into two groups (converters and nonconverters to AD). Results: When comparing patients with AD to HS, widespread areas of reduced gray matter density were found predominantly in temporal, frontal, and parietal lobes and in the insula. Comparing MCI converters and nonconverters with HS, the converters showed more widespread areas of reduced gray matter density than nonconverters, with a pattern of abnormalities similar to that seen in patients with AD. Conversely, when comparing the same groups with patients with AD, MCI nonconverters showed a pattern of gray matter density similar to that of HS. Areas of decreased gray matter density were also found in MCI converters compared with nonconverters. Conclusions: Different patterns of gray matter density distribution in patients with mild cognitive impairment may be associated to different rates of conversion to Alzheimer disease.
- Subjects :
- Male
medicine.medical_specialty
Pathology
computer.software_genre
behavioral disciplines and activities
Alzheimer Disease
Voxel
Internal medicine
mental disorders
medicine
Humans
Dementia
Cognitive impairment
Aged
Brain Mapping
Voxel-based morphometry
medicine.disease
Magnetic Resonance Imaging
Density distribution
Disease Progression
Cardiology
Female
Neurology (clinical)
Alzheimer's disease
Cognition Disorders
Psychology
computer
Insula
Diffusion MRI
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....bae36b5b88493b374a73ed5cddd1296f