May 2026

A bug has been identified in a fraction of de-faced Magnitude DICOM series for multi-echo GRE (ME-T2starw) MRI sequences, wherein volumes were assembled in the incorrect order with incorrect echo times. We have included a list of affected images. For ADNI, this was 140 image series, roughly 16% of MEGRE magnitude series available. Users who have downloaded affected image IDs, or QSM analyses containing them, should delete their copies and any downstream analyses. We are in the process of removing all affected images from LONI and uploading corrected DICOM to replace them, in the next 1-2 weeks. These replacements will have new LONI ImageIDs. We apologize for not catching this error, and we thank the Michael Ewers lab at LMU Munich for bring it to our attention. Thank you for your understanding!

To obtain a listing of removed image series, please download from the IDA, the dataset labeled “Data Advisory: Listing of removed multi-echo GRE (ME-T2starw) images”

March 2026

Summary:

Data collected from 78 ADNI participants has been removed from the IDA.

Description:

A recent review of ADNI data raised a serious data quality concern.

ADNI leadership reviewed the data in question, and after extensive analyses and discussion, made the decision to remove the data from PTIDs with the format 381_S_#####.

Of particular concern was the clinically acquired cognitive and functional assessment data. Due to the critical nature of those results for interpreting ADNI biomarker data, the decision at this time has been to remove all data associated with those PTIDs.

All affiliated data from those 78 PTIDs have been removed from the LONI-IDA ADNI data repository.

Recommendations:

ADNI leadership strongly advises that data with these PTIDs not be used in any analysis, submission of abstracts, or publications. 

Furthermore, the ADNI leadership requests that any abstracts or papers which have been submitted using these data be appropriately revised due to concerns with the data quality.  Finally, a reminder that the ADNI Data Use Agreement states that no efforts can be made to identify the ADNI participants or ADNI site locations.