• Select the area you would like to search.
  • ACTIVE INVESTIGATIONS Search for current projects using the investigator's name, institution, or keywords.
  • EXPERTS KNOWLEDGE BASE Enter keywords to search a list of questions and answers received and processed by the ADNI team.
  • ADNI PDFS Search any ADNI publication pdf by author, keyword, or PMID. Use an asterisk only to view all pdfs.


Question Posted 07/27/20:
I read here methods/mri-tool/mri-pre-processing/ that pre-processing is not needed for MRI images. Is this true also for fMRI images? Do I need to perform any of unwrap, reslicing, timing correction, normalization and smoothing if I download the NiFTI version of the files, or are these files already ready for analysis?

Response posted 07/27/20 by Jeff Gunter:
The images you get from ADNI for RS-fMRI are not modified in anyway. You need to do all the preprocessing yourself. (If ADNI did this, we'd never choose parameters that users would find acceptable...)

In ADNI-1 (2004-2009), we performed both B1 and gradient distortion correction for T1-weighted images. Those are performed on all scanners currently in ADNI-3.
Go back to list of topics >