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The filters you have selected from various query interfaces will be stored here, in the 'Filter Cart'. The database will be queried using filters added to your 'Filter Cart', when multiple filters are defined, each will be executed using 'AND' logic, so with each filter that is applied the result set gets smaller.

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Description
Value Range
Notes
Data Structures with shared data
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Imaging_qa

imaging_qa

01

QA for all imaging data

Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/project
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging was completed. MM/DD/YYYYRequired field
interview_ageIntegerRequiredAge in months at the time of the interview/test/sampling/imaging.0 :: 1260Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month.
genderString20RequiredSex of the subjectM;FM = Male; F = Female
experiment_idIntegerRequiredID for the Experiment/settings/run
file_sourceString1,024RequiredFile name/location
external_minFloatRequiredThe minimum voxel intensity in the non-head region.
external_maxFloatRequiredThe maximum voxel intensity in the non-head region.
external_robust_minFloatRequiredThe robust (2nd percentile) voxel intensity in the non-head region.
external_robust_maxFloatRequiredThe robust (98th percentile) voxel intensity in the non-head region.
external_meanFloatRequiredThe mean voxel intensity in the non-head region.
external_stdFloatRequiredThe standard deviation of voxel intensities in the non-head region.
external_voxelsIntegerRequiredThe number of voxels in the non-head region.
external_volumeFloatRequiredThe volume (in mm3) of the non-head region.
brain_minFloatRequiredThe minimum voxel intensity in the brain.
brain_maxFloatRequiredThe maximum voxel intensity in the brain.
brain_robust_minFloatRequiredThe robust (2nd percentile) voxel intensity in the brain.
brain_robust_maxFloatRequiredThe robust (98th percentile) voxel intensity in the brain.
brain_meanFloatRequiredThe mean voxel intensity in the brain.
brain_stdFloatRequiredThe standard deviation of voxel intensities in the brain.
brain_voxelsIntegerRequiredThe number of voxels in the brain.
brain_volumeFloatRequiredThe volume (in mm3) of the brain.
csf_minFloatRequiredThe minimum voxel intensity in the CSF.
csf_maxFloatRequiredThe maximum voxel intensity in the CSF.
csf_robust_minFloatRequiredThe robust (2nd percentile) voxel intensity in the CSF.
csf_robust_maxFloatRequiredThe robust (98th percentile) voxel intensity in the CSF.
csf_meanFloatRequiredThe mean voxel intensity in the CSF.
csf_stdFloatRequiredThe standard deviation of voxel intensities in the CSF.
csf_voxelsIntegerRequiredThe number of voxels in the CSF.
csf_volumeFloatRequiredMRI Variables: CSF volume (mm3)
gm_minFloatRequiredThe minimum voxel intensity in the gray matter.
gm_maxFloatRequiredThe maximum voxel intensity in the gray matter.
gm_robust_minFloatRequiredThe robust (2nd percentile) voxel intensity in the gray matter.
gm_robust_maxFloatRequiredThe robust (98th percentile) voxel intensity in the gray matter.
gm_meanFloatRequiredThe mean voxel intensity in the gray matter.
gm_stdFloatRequiredThe standard deviation of voxel intensities in the gray matter.
gm_voxelsIntegerRequiredThe number of voxels in the gray matter.
gm_volumeFloatRequiredThe volume (in mm3) of the gray matter.
wm_minFloatRequiredThe minimum voxel intensity in the white matter.
wm_maxFloatRequiredThe maximum voxel intensity in the white matter.
wm_robust_minFloatRequiredThe robust (2nd percentile) voxel intensity in the white matter.
wm_robust_maxFloatRequiredThe robust (98th percentile) voxel intensity in the white matter.
wm_meanFloatRequiredThe mean voxel intensity in the white matter.
wm_stdFloatRequiredThe standard deviation of voxel intensities in the white matter.
wm_voxelsIntegerRequiredThe number of voxels in the white matter.
wm_volumeFloatRequiredThe volume (in mm3) of the white matter.
snrFloatRequiredbrain_mean/external_stdbrain_snr
input_pot_clipped_voxelsIntegerRequiredThe number of potentially clipped voxels in the input volumes.
input_vols_mi_abs_z_3_indIntegerRequiredThe number of input volumes with mean intensity greater than 3 standard deviations from the individual means.
input_vols_mi_abs_z_3_rgmIntegerRequiredThe number of input volumes with mean intensity greater than 3 standard deviations from the grand mean.
input_vols_mi_abs_z_4_indIntegerRequiredThe number of input volumes with mean intensity greater than 4 standard deviations from the individual means.
input_vols_mi_abs_z_4_rgmIntegerRequiredThe number of input volumes with mean intensity greater than 4 standard deviations from the grand mean.
input_vols_mvd_1IntegerRequiredThe number of input volumes with mean volume difference > 1%.
input_vols_mvd_2IntegerRequiredThe number of input volumes with mean volume difference > 2%.
masked_mean_fwhm_xFloatRequiredThe mean FWHM in the X dimension of the masked volumes.
masked_mean_fwhm_yFloatRequiredThe mean FWHM in the Y dimension of the masked volumes.
masked_mean_fwhm_zFloatRequiredThe mean FWHM in the Z dimension of the masked volumes.
masked_detr_vols_run_diff_1IntegerRequiredThe number of masked, detrended volumes with running difference > 1%.
masked_detr_vols_run_diff_2IntegerRequiredThe number of masked, detrended volumes with running difference > 2%.
masked_detr_vols_1_outliersIntegerRequiredThe number of masked, detrended volumes
masked_detr_vols_2_outliersIntegerRequiredThe number of masked, detrended volumes
masked_detrended_meanFloatRequiredThe mean of the masked, detrended volume.
masked_detr_mean_snr1FloatRequiredThe mean signal-to-noise ratio of the masked, detrended volumes.
masked_detr_mean_sfnrFloatRequiredThe mean signal-to-fluctuation-noise ratio of the masked, detrended volumes.
image_origin_checkString50RequiredDTIPrep image origin check.
image_space_checkString50RequiredDTIPrep image space check.
image_spaced_direction_checkString50RequiredDTIPrep space direction check.
image_spacing_checkString50RequiredDTIPrep image spacing check.
image_size_checkString50RequiredDTIPrep image size check.
image_gradient_checkString50RequiredDTIPrep image gradient check.
diffusion_meas_frame_checkString50RequiredDTIPrep measurement frame check.
diffusion_slicewise_checkString50RequiredDTIPrep slicewise check.
dwi_interlacewise_checkString50RequiredDTIPrep interlacewise check.
dwi_gradientwise_checkString50RequiredDTIPrep gradientwise check.
job_nameString50RequiredIdentity of the run for pipeline processes
origin_dataset_idIntegerRequiredOrigin dataset Id
scan_typeString50RequiredType of ScanMR diffusion; fMRI; MR structural (MPRAGE); MR structural (T1); MR structural (PD); MR structural (FSPGR); MR structural (FISP); MR structural (T2); PET; ASL; microscopy; MR structural (PD, T2); MR structural (B0 map); MR structural (B1 map); single-shell DTI; multi-shell DTI; Field Map; X-Ray; static magnetic field B0
atlasString255RecommendedAtlas
atlas_versionString255RecommendedAtlas version
derived_filesFileRecommendedAn archive of the files produced by the pipeline
img03_idIntegerRecommendedCorresponds to row_id in image03 data structure, mapping derivative to source record in image03
pipelineString100RecommendedPipeline name
pipeline_scriptString255RecommendedFile from pipeline used to derive output
pipeline_toolsString255RecommendedSpecific tools used in a pipeline (i.e., FreeSurfer, FSL, ANTs)
pipeline_typeString255RecommendedDescription of pipeline platform (i.e., LONI, NITRC-CE, NiPype)
pipeline_versionString255RecommendedVersion assigned to pipeline
qc_fail_quest_reasonString255RecommendedProvide a reason that the image was determined to fail a quality control check or if the quality control check determined that the image was questionable
qc_outcomeString25RecommendedProvide information on the conclusion of the quality control methods regarding the quality of the imagepass;fail;questionable
successString8RecommendedIndicates QA test success or failuresuccess; failure
comments_miscString4,000RecommendedMiscellaneous comments on study, interview, methodology relevant to this form data
snr_bIntegerRecommendedbrain_mean / brain_std
cnrIntegerRecommended(wm_mean - gm_mean) / external_stdwm - white matter; gm - gray matter; std - standard deviation
cnr_bIntegerRecommended(wm_mean - gm_mean) / (.5 * (wm_std + gm_std))wm - white matter; gm - gray matter; std - standard deviation
compl_fileIntegerRecommendedCorrect number of dicom files for the imaging sequence0 :: 10=Incomplete; 1=Completecompleted
abcd_compliantIntegerRecommendedSequence parameters compliant with the ABCD imaging protocol0 :: 10=Non ABCD Compliant; 1= ABCD Compliant
brain_tsnr_meanFloatRecommendedMean value of temporal SNR within the brain
brain_tsnr_medianFloatRecommendedMedian value of temporal SNR within the brain
brain_tsnr_stdFloatRecommendedStandard deviation of temporal SNR within the brain.
mean_motionFloatRecommendedMean value of subject motion (framewise displacement) through timeReported in mm
subthresh_02FloatRecommendedAbsolute time with subject motion (framewise displacement) below 0.2 mmReported in seconds
subthresh_03FloatRecommendedAbsolute time with subject motion (framewise displacement) below 0.3 mmReported in seconds
subthresh_04FloatRecommendedAbsolute time with subject motion (framewise displacement) below 0.4 mmReported in seconds
nbad_frame_slicesIntegerRecommendedNumber of bad slices for all frames
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

Please email the The NDA Help Desk with any questions.

Distribution for DataStructure: imaging_qa01 and Element:
Chart Help

Filters enable researchers to view the data shared in NDA before applying for access or for selecting specific data for download or NDA Study assignment. For those with access to NDA shared data, you may select specific values to be included by selecting an individual bar chart item or by selecting a range of values (e.g. interview_age) using the "Add Range" button. Note that not all elements have appropriately distinct values like comments and subjectkey and are not available for filtering. Additionally, item level detail is not always provided by the research community as indicated by the number of null values given.

Filters for multiple data elements within a structure are supported. Selections across multiple data structures will be supported in a future version of NDA.