• 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 12/03/22:
Can you point out where to find the sequence information of MRI, and DTI for ADNI2/GO such as TE/TR, TI, and flip angle? I checked https://adni.loni.usc.edu/methods/documents/mri-protocols/, and found information only about medical systems and examed https://adni.loni.usc.edu/methods/documents/ and only found that informaton for ADNI3.
Response posted 12/09/22 by Rob Reid:
Hello Amanda,
ADNI2's DTIs were GE only, with flip angle 90 degrees, had no TI, and had TE ranging from 62 (Discovery 750) to 84 (Signa HDx) ms. TR varied from 9 to 12 s, but that had no effect on the image contrast. The TR variation was partly driven by TE (which was driven by the gradient hardware), and partly by participant size or weight, as the scanners automatically adjusted TR to stay under the PNS limit.

Hopefully someone else can help you with the other sequences and/or finding this on LONI.
Go back to list of topics >