ISMRM 2015 Tractography challenge - Data

Challenge data

The ISMRM 2015 Tractography challenge was based on an artificial phantom generated using the Fiberfox software, based on bundles segmented from a HCP subject. The aim was to create a realistic, clinical-style dataset that provided challenging bundles configurations.

Various packages are available here:

  • The challenge datasets that include all artifacts
  • NEW: the ground-truth bundles that served as a basis for the generation of the dataset
  • NEW: the artifact-free, ground-truth Diffusion-Weighted Image
  • NEW: an archive containing the basic files needed to simulate the ground truth DWIs using Fiberfox.
For all downloads, see the downloads section.

Data description

The clinical-style challenge dataset consists of a 2mm isotropic diffusion acquisition, with 32 gradient directions, b-value=1000 s/mm2. It also contains one b=0 image and an optional b=0 volume, with reversed phase-encoding direction. Additionnaly, a T1-like image is provided.


Example slice of DWI

Example slice of field map

Example slice of T1

Data generation

Data was generated using Fiberfox, based on 25 manually segmented white matter bundles. These 25 bundles serve as ground truth models. They are used as artificial fibers to generate the raw diffusion MRI dataset, as described in the Fiberfox paper by Neher et al. Hence, this is just another way to generate a phantom dataset based on realistic looking streamline fibers.

The white matter bundles were manually segmentated based on definitions found in Diffusion Tensor Imaging, Introduction and Atlas, which was written by challenge coorganizers Bram Stieltjes and Klaus Maier-Hein, as well as R.M. Brunner and F.B. Laun.

Acquisition parameters

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Important note about the Field Map

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Downloads

All datasets refer to the same "subject". See the next section for information on how to validate the integrity of your download.

  • Basic dataset
    Details (click to show)
  • Dataset with additional, reversed-phase b=0
    Details (click to show)
  • Ground truth bundles, VTK format
    Details (click to show)
  • Ground truth bundles, TCK format
    Details (click to show)
  • Ground truth bundles, TRK format
    Details (click to show)
  • Ground truth, artifact-free DWI
    Details (click to show)
  • Files used to generate Ground Truth DWI
    Details (click to show)

Archive integrity verification

Click to show integrity verification procedure