MRI preview system
With the NACC MRI selection preview system, you can get an estimate of the number of UDS participants with Mixed Protocol (formerly ‘Legacy’ or ‘Nonstandard’) MRIs that meet the criteria you define — criteria based on MRI image type, or UDS clinical characteristics of the participants, or both. Standardized Centralized Alzheimer’s and Related Dementias Neuroimaging (SCAN) MRIs are not available via the NACC MRI selection preview system.
Please note that the estimated totals supplied by the MRI selection preview system are not suitable for data analysis or publication. When you are ready to download images for analysis and publication purposes — or if your inquiry requires more detailed information — please submit a data request.
CAUTION: The de-identified MRI DICOM files were voluntarily submitted to NACC by the Alzheimer’s Disease Research Centers (ADRC). DICOM files submitted do not have a standard, common format, thus, the “metadata” in tags labels and headers will vary in position and may also contain inconsistencies or inaccuracies. Motion and coverage artifacts may occasionally be present despite ADRC efforts to avoid their inclusion. NACC has screened for and removed accidental remaining PHI missed by ADRC de-identification, however rare, undiscovered instances could potentially remain embedded in metadata. If you note such potential PHI occurrences, please report them to NACC immediately for corrective action.