NIfTI-1 Test Data Sets

Valid test data sets of 3D (structural) and 4D (functional) images in NIfTI-1 format.

This information was taken from https://nifti.nimh.nih.gov/nifti-1/data

Note: The software nifti_tool is part of the reference implementation.

3D Structural Images

Labeled LR Standard (MNI152) Images in Nifti Format

Two images in nifti1 format (dual file or single file) in MNI152 space, with appropriate sform and qform (gzipped for convenient transfer)

• avg152T1_LR_nifti.hdr.gz and avg152T1_LR_nifti.img.gz or avg152T1_LR_nifti.nii.gz

  • dimensions: 91 x 109 x 91 ; 2mm x 2mm x 2mm
  • text header dump by nifti_tool: avg152T1_LR_nifti_ntool.txt

• avg152T1_RL_nifti.hdr.gz and avg152T1_RL_nifti.img.gz or avg152T1_RL_nifti.nii.gz

  • dimensions: 91 x 109 x 91 ; 2mm x 2mm x 2mm
  • text header dump by nifti_tool: avg152T1_RL_nifti_ntool.txt

The first image (LR) is stored in radiological convention. The second image (RL) is stored in neurological convention. Any nifti-1 compliant viewing software should display these images identically.

Statistic Image

A single z-statistic image in gzipped single file nifti-1 form

• zstat1.nii.gz

  • dimensions: 64 x 64 x 21 ; 4mm x 4mm x 6mm
  • text header dump by nifti_tool: zstat1_ntool.txt

4D Functional Images

Simple Time-series or multi-volume image

A simple image time-series in gzipped single file nifti-1 form.

• filtered_func_data.nii.gz

  • dimensions: 64 x 64 x 21 x 180 ; 4mm x 4mm x 6mm x 3 sec
  • text header dump by nifti_tool: filtered_func_data_ntool.txt

Sternberg Item Recognition Paradigm (SIRP) fMRI Study + XML Extension Data

• sirp_fmri_study_ver4.tar.gz

  • text header dump by nifti_tool: newsirp_final_XML_ntool.txt

147 volumes of a SIRP study in a single NIfTI *.nii image file with sform and qform properly set and an extension space consisting of the XCEDE XML formatted E-prime task data, Quickmood assessments acquired before and after the scanning session, and the image acquisition parameters. The first volume of the series contains an "L" superimposed on the left side of the volume to help in testing implementations that read the qforms. Additionally the XML file portion is also saved as an independent XML file for easy browsing called 103.1.sirp.xml. Also includes a PDF description of task.

Minimal Nifti1 Dataset

The "minimal" dataset minimal.hdr.gz, minimal.img.gz and minimal.nii.gz is provided as an example and test dataset. It contains close to the minimum number of header fields that need to be set in NIfTI1 dataset and have it still conform to the NIfTI1 standard. It is not the very minimum, because one could create 1 dimensional image. But, we wanted to provide a minimal dataset that could be loaded and viewed as an image. minimal.img is a simple ramp image, increasing from 0-63 along the Y axis. See the NIfTI1 FAQ question #4 for an explanation of the minimal fields that must be set in NIfTI1 datasheet.