The content of this repository can also be viewed here:
https://bids-standard.github.io/bids-examples/
bids-examples
This repository contains a set of BIDS-compatible datasets with empty raw data files. These datasets can be useful to:
- write lightweight software tests
- serve as an example on how a BIDS dataset can be structured
ALL RAW DATA FILES IN THIS REPOSITORY ARE EMPTY!
However for some of the data, the headers containing the metadata are still
intact. (For example the NIfTI headers for .nii files, the BrainVision data
headers for .vhdr files, or the OME-XML headers for .ome.tif files.)
Headers are intact for the following datasets:
synthetic- Most EEG or iEEG data in BrainVision format (e.g.,
eeg_matchingpennies)
Validating BIDS examples
The next three sections mention a few details on how the bids-examples can be
validated using bids-validator.
For general information on the bids-validator, including installation and
usage, see the
bids-validator README file.
Validating individual examples
Since all raw data files in this repository are empty, the bids-validator must
to be configured to not report empty data files as errors. (See more on
bids-validator configuration in the
bids-validator README.)
Just run the validator as follows (using the eeg_matchingpennies dataset as an
example, and assuming you are in a command line at the root of the
bids-examples repository):
bids-validator eeg_matchingpennies --config.ignore=99
The --config.ignore=99 "flag" tells the bids-validator to ignore empty data
files rather than to report the "empty file" error .
For datasets that contain NIfTI .nii files, you also need to add the
ignoreNiftiHeaders flag to the bids-validator call, to suppress the issue
that NIfTI headers are not found.
For example:
bids-validator ds003 --config.ignore=99 --ignoreNiftiHeaders
Validating all examples
If you want to validate all examples in one go, you can use the run_tests.sh
script that is provided in this repository. This script makes use of the
bidsconfig.json configuration file for the bids-validator, and appropriately
handles some special case examples (see
Validator Exceptions).
Simply run bash run_tests.sh in a command line from the root of the
bids-examples repository.
Validator exceptions
Some datasets may include a custom .bids-validator-config.json to ignore
errors generated from idiosyncrasies of the datasets as they existed on
creation.
| name | errors ignored |
|---|---|
| genetics_ukbb | SliceTiming values for tasks is larger than given TR, EchoTime1 and EchoTime2 are not provided for any of the phasediff files. |
Other datasets may include a .SKIP_VALIDATION file, to skip the validation
with the continuous integration service. This is useful for datasets that
cannot pass at the moment due to lack of coverage in the
bids-validator.
Note however, that the .SKIP_VALIDATION file only impacts the continuous
integration service, or validation when run with the run_tests.sh script (see
Validating all examples). This file does not
have any effect when running bids-validator from custom scripts, the web-based
validator, docker, or from the command line.
| name | why skipped |
|---|---|
| ds000001-fmriprep | lack of coverage for "derivatives" in bids-validator |
Contributing
We are happy to receive contributions in the form of:
- updates to existing examples, or the dataset index
- new examples
- only if they cover aspects that are currently not covered by existing examples
- only if a maintainer can be found for this dataset
- suggestions on how to improve the bids-examples repository
For more information, please see our CONTRIBUTING.md file or open a new GitHub Issue and ask us directly.
Dataset index
ASL
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| asl001 | T1w, asl (GE, PCASL, 3D_SPIRAL), m0scan within timeseries | anat, perf | T1w, asl, aslcontext, asllabeling | link | @patsycle |
| asl002 | T1w, asl (Philips, PCASL, 2D_EPI), m0scan as separate scan | anat, perf | T1w, asl, aslcontext, asllabeling, m0scan | link | @patsycle |
| asl003 | T1w, asl (Siemens, PASL, multiTI), M0scan as separate scan | anat, perf | T1w, asl, aslcontext, asllabeling, m0scan | link | @patsycle |
| asl004 | T1w, asl (Siemens, PCASL, multiPLD with pepolar), m0scan separate scans with pepolar appraoch | anat, fmap, perf | T1w, asl, aslcontext, asllabeling, m0scan | link | @patsycle |
| asl005 | T1w, asl (Siemens, PCASL, singleTI, 3D_GRASE), m0scan as separate scan | anat, perf | T1w, asl, aslcontext, asllabeling, m0scan | link | @patsycle |
EEG
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| eeg_cbm | Rest EEG. European Data Format (.edf) | eeg | channels, eeg, events, scans | n/a | @cpernet |
| eeg_ds003645s_hed | Shows usage of Hierarchical Event Descriptor (HED) in events files | eeg | channels, eeg, events | link | @VisLab |
| eeg_ds003645s_hed_inheritance | HED annotation with multiple inherited sidecars | eeg | channels, eeg, events | link | @VisLab |
| eeg_ds003645s_hed_library | HED annotation using HED library vocabularies (schema). | eeg | channels, eeg, events | link | @VisLab |
| eeg_ds003645s_hed_longform | HED annotation using tags in long form. | eeg | channels, eeg, events | link | @VisLab |
| eeg_face13 | Deconstructing the early visual electrocortical response to face and house stimuli. EDF format | eeg | channels, coordsystem, eeg, electrodes, events | n/a | @andesha |
| eeg_matchingpennies | Offline data of BCI experiment decoding left vs. right hand movement. BrainVision data format (.eeg, .vhdr, .vmrk) | eeg | channels, eeg, events | link | @sappelhoff |
| eeg_rishikesh | Mind wandering experiment. EEG data in Biosemi (.bdf) format | eeg | channels, eeg, events | link | @arnodelorme |
iEEG
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| ieeg_epilepsyNWB | multiple sessions, tutorial — derivative dataset of ieeg_epilepsy showcasing the NWB file format alternative |
anat, ieeg | T1w, channels, coordsystem, electrodes, events, ieeg, scans | link | @TheChymera |
| ieeg_epilepsy | multiple sessions, tutorial | anat, ieeg | T1w, channels, coordsystem, electrodes, events, ieeg, scans | link | @ftadel |
| ieeg_epilepsy_ecog | multiple sessions, tutorial | anat, ieeg | T1w, channels, coordsystem, electrodes, events, ieeg, photo, scans | link | @ftadel |
| ieeg_filtered_speech | recordings of three seizures | ieeg | channels, coordsystem, electrodes, events, ieeg, photo | n/a | @choldgraf |
| ieeg_motorMiller2007 | Cue-based hand & tongue movement data | ieeg | channels, coordsystem, electrodes, events, ieeg | n/a | @dorahermes |
| ieeg_visual | Stimulus dependence of gamma oscillations in human visual cortex | anat, ieeg | T1w, channels, coordsystem, electrodes, events, ieeg | n/a | @dorahermes |
| ieeg_visual_multimodal | n/a | anat, fmap, func, ieeg | T1w, bold, channels, coordsystem, electrodes, epi, events, ieeg, sbref | n/a | @irisgroen |
MEG
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| ds000117 | A multi-subject, multi-modal human neuroimaging dataset of 19 subjects on a MEG visual task | anat, beh, dwi, fmap, func, meg | T1w, beh, bold, channels, coordsystem, dwi, events, headshape, magnitude1, magnitude2, meg, phasediff, scans | link | @RikHenson |
| ds000246 | Auditory dataset used for Brainstorm’s general online tutorial | anat, meg | ChannelGroupSet, ClassFile, MarkerFile, T1w, channels, coordsystem, default, headshape, meg, params, photo, processing, scans | link | @guiomar |
| ds000247 | Five minutes, eyes-open, resting-state MEG data from 5 subjects. This is a sample from The Open MEG Archive (OMEGA). | anat, meg | ClassFile, T1w, bad, channels, coordsystem, default, headshape, meg, params, processing, scans | link | @guiomar |
| ds000248 | MNE sample data: Data with visual and auditory stimuli | anat, meg | FLASH, T1w, channels, coordsystem, events, meg, scans | link | @agramfort |
Microscopy
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| micr_SEM | Example SEM dataset in PNG format with 1 sample imaged over 2 sessions | micr | SEM, photo, samples, sessions | link | @jcohenadad |
| micr_SEMzarr | Example SEM dataset in PNG and OME-ZARR format with 1 sample imaged over 2 sessions | micr | SEM, samples, sessions | n/a | @TheChymera |
| micr_SPIM | Example SPIM dataset in OME-TIFF format with 2 samples from the same subject with 4 chunks each | micr | SPIM, photo, samples | link | @jcohenadad |
Motion
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| motion_dualtask | older and younger participants walking while performing discrimination task | eeg, motion | channels, eeg, events, motion, scans | n/a | @sjeung |
| motion_spotrotation | participants rotated heading using full-body motion or joystick | eeg, motion | channels, coordsystem, eeg, electrodes, events, motion, scans | link | @sjeung |
| motion_systemvalidation | Example dataset of two different motion captured system recorded almost simultaneously, but no brain data | motion | channels, motion, scans | link | @JuliusWelzel |
MRI
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| 7t_trt | n/a | anat, fmap, func | T1map, T1w, bold, magnitude1, magnitude2, phasediff, physio, scans, sessions | link | n/a |
| ds000117 | A multi-subject, multi-modal human neuroimaging dataset of 19 subjects on a MEG visual task | anat, beh, dwi, fmap, func, meg | T1w, beh, bold, channels, coordsystem, dwi, events, headshape, magnitude1, magnitude2, meg, phasediff, scans | link | @RikHenson |
| ds001 | single task, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds002 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds003 | single task, single run | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds005 | single task, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds006 | single task, multiple sessions, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds007 | single task, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds008 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds009 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2, scans | link | n/a |
| ds011 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds051 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds052 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds101 | single task, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds102 | single task, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds105 | single task, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds107 | single task, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds108 | single task, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds109 | multiple tasks, multiple runs | anat, func | T1w, bold, events | link | n/a |
| ds110 | single task, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds113b | forrest gump watching, multiple sessions, multiple runs | func | bold, events | link | n/a |
| ds114 | multiple tasks, multiple runs | anat, dwi, func | T1w, bold, dwi, events | link | n/a |
| ds116 | multiple tasks, multiple runs | anat, func | T1w, bold, events, inplaneT2 | link | n/a |
| ds210 | multiple tasks, multiple runs | func | bold, physio | link | n/a |
| eeg_rest_fmri | Resting state with simultaneous fMRI. BrainVision data format (.eeg, .vhdr, .vmrk) | anat, dwi, eeg, func | T1w, bold, dwi, eeg | n/a | @cpernet |
| genetics_ukbb | multiple tasks, T1w, DTI, BOLD, genetic info | anat, dwi, fmap, func | FLAIR, T1w, bold, dwi, events, info, magnitude1, phasediff | n/a | @cpernet |
| ieeg_visual_multimodal | n/a | anat, fmap, func, ieeg | T1w, bold, channels, coordsystem, electrodes, epi, events, ieeg, sbref | n/a | @irisgroen |
| synthetic | A synthetic dataset | anat, beh, func | T1w, beh, bold, events, physio, scans, sessions, stim | n/a | @effigies |
NIRS
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| fnirs_automaticity | 24 subjects performing (non-)automatic finger tapping and foot stepping | nirs | channels, coordsystem, events, nirs, optodes, practicelogbook, scans | link | @robertoostenveld |
| fnirs_tapping | Example fNIRS measurement with three conditions from five subjects | nirs | channels, coordsystem, events, nirs, optodes, scans | link | @rob_luke |
PET
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| pet001 | T1w, PET, blood | anat, pet | T1w, blood, pet | n/a | @mnoergaard |
| pet002 | T1w, PET | anat, pet | T1w, pet | link | @mnoergaard |
| pet003 | T1w, PET, blood | anat, pet | T1w, blood, pet | n/a | @mnoergaard |
| pet004 | PET, blood | pet | blood, pet | n/a | @mnoergaard |
| pet005 | T1w, PET | anat, pet | T1w, events, pet | n/a | @mnoergaard |
qMRI
| name | description | datatypes | suffixes | link to full data | maintained by |
|---|---|---|---|---|---|
| qmri_irt1 | Inversion Recovery T1 mapping | anat | IRT1 | not publicly availabe |
@agahkarakuzu |
| qmri_megre | Multi-Echo Gradient-Echo for T2star mapping. | anat | MEGRE | not publicly availabe |
@agahkarakuzu |
| qmri_mese | Multi-Echo Spin-Echo for T2 or Myelin Water Fraction (MWF) mapping. | anat | MESE | not publicly availabe |
@agahkarakuzu |
| qmri_mp2rage | MP2RAGE for T1 mapping | anat | MP2RAGE, defacemask | link | @Gilles86 |
| qmri_mp2rageme | Multi-echo MP2RAGE | anat, fmap | MP2RAGE, TB1map | link | @Gilles86 |
| qmri_mpm | Multi-parametric mapping for R1, R2star, MTsat and PD mapping | anat, fmap | MPM, RB1COR, TB1EPI, magnitude1, magnitude2, phasediff | link | @ChristophePhillips |
| qmri_mtsat | Example dataset for T1 and MTsat mapping. Includes a double-angle B1+ mapping example. | anat, fmap | MTS, TB1DAM | link | @agahkarakuzu |
| qmri_qsm | Chimap using fast QSM | anat | T1w | not publicly availabe |
@agahkarakuzu |
| qmri_sa2rage | Fast B1+ mapping using SA2RAGE | fmap | TB1SRGE | not publicly availabe |
@agahkarakuzu |
| qmri_tb1tfl | B1+ mapping with TurboFLASH readout. | fmap | TB1TFL | not publicly availabe |
@agahkarakuzu |
| qmri_vfa | Variable Flip Angle T1 mapping. Includes an Actual Flip Angle (AFI) B1+ mapping example. | anat, fmap | TB1AFI, VFA | link | @agahkarakuzu |