NACC research structural MRI
NACC MRI sample characteristics
Modality | MRI |
---|---|
MRI types |
T1-weighted FLAIR DTI T2 Other |
MRI data format | DICOM (.dcm) image files |
MRI package format | .zip |
Method of MRI collection | ADCs voluntarily submit available images to NACC. Image-acquisition and data-collection protocols vary by ADC. Retrospective and prospective data collections is ongoing. |
Image acquisition period | 2005 – present |
Subjects | ADC subjects enrolled in the Uniform Data Set (UDS) |
Clinical diagnoses | Normal cognition, MCI, dementia |
Linked genotype data | Available from ADGC |
Longitudinal MRIs | Available for some subjects |
The NACC Research Structural MRI Database is a large, freely available sample of MRIs that are linked to the standardized UDS and NP data, as well as genotype data from ADGC.
MRIs at NACC are most appropriately described as a convenience sample of images, voluntarily submitted by several Alzheimer's Disease Centers. Imaging data collection and acquisition protocols vary by ADC; thus, packages of MRI files at NACC may include T1-weighted, FLAIR, DTI, T2, or other MR series (and any combination thereof), and subjects may or may not have multiple scan sessions in the NACC database.
Accessing MRI image files
TO VIEW A SAMPLE OF MRIs meeting specified image and subject criteria: | ||
---|---|---|
NACC's MRI query system |
Available data: |
Researcher requirements: |
• Sample size estimation: – Number of MRI files meeting criteria – Number of unique UDS subject IDS meeting criteria |
Name Email address Acknowledgment of NACC's
Visualization software |
|
TO REQUEST IMAGE FILES for analysis and publication purposes: | ||
NACC data file request |
Available data: |
Researcher requirements: |
"Packages" of DICOM MRIs archived by subject ID and MRI date (.zip), delivered via a cloud-based distribution system and linked to any requested UDS, FTLD, or NP data. Note: Additional image types not requested may be included in the package. |
Name Email address Proposal title Brief project description
Acknowledgment of NACC's
Visualization software |
Please note that to download images for analysis and publication purposes, a more detailed data request is required.