Data dictionary
pairs.tsv
This pairing table contains one row per logical volume in the complete dataset, including controlled ADNI volumes that are not redistributed in the public archive.
| Field | Meaning |
|---|---|
volume_id |
Unique volume identifier and filename stem |
source_dataset |
Stable machine-readable source code |
pair_id |
Paired acquisition or visit identifier within a source |
modality |
Structural contrast: T1W, T2W or T2FLAIR |
field_strength |
Acquisition field strength of this volume |
paired_field_strength |
Field strength of the matched volume |
relative_path |
Intended path in the complete dataset layout; ADNI paths are reconstruction targets and are not present in the public archive |
case_group |
Paired-case grouping key for partitioning; it is not guaranteed to link repeated visits from one participant |
availability.tsv
availability.tsv adds explicit access information keyed by volume_id.
| Field | Meaning |
|---|---|
access_status |
public or controlled |
public_file_present |
Whether the image is included in the public archive |
source_record |
Persistent source record or controlled-access landing page |
access_note |
Practical access instruction |
file_manifest.tsv
Lists the 424 publicly downloadable NIfTI files, their byte sizes and SHA-256 identifiers. The SHA-256 values correspond to the Git LFS object identifiers in the frozen Hugging Face revision.
dataset_summary.tsv
Contains source-level counts for paired cases, same-contrast image pairs and logical volumes.
ADNI selection lists
The two CSV files in adni/ each contain 47 rows corresponding to the 47 paired ADNI cases described in the manuscript. They identify the matched 1.5 T and 3 T images that authorised users can request from LONI. They do not contain MRI image files.