Real data supporting HTTomolib/GPU libraries

This is an archive containing real data for testing methods of HTTomoLib and HTTomoLibGPU packages. Also see Python scripts and images. 

Data description:

I12 Beamline data

Dataset file
Information
Data charachteristics
Notes

i12_dataset1.npz (119647.nxs)
180-degrees scan of a sandstone rock

Data dimensions [1801, 50, 2560] as [angles, detY, detX], flats [50, 50, 2560] and darks are [20, 50, 2560]. Data type is uint16.

The resolution of the sample is well-defined and the sample is fully within the field of view (FOV). This provides some freedom for experimentation using various preprocesing and reconstruction methods.

i12_dataset2.npz (146344.nxs)
180-degrees scan

Data dimensions [2050, 50, 2560] as [angles, detY, detX], flats and darks are [51, 50, 2560]. Data type is uint16.

The sample is larger than FoV and noisy. VoCentering method to find the centre of rotation can be tested on this data.

i12_dataset3.npz (119647.nxs)

180-degrees scan of a sandstone rock

projections, darks and flats are [2050, 2560] as [detY, detX]. Data type is uint16.

This data is suitable to test the centering method based on the phase cross-correlation

i12_dataset4.npz (68067.nxs)
180-degrees scan
Data dimensions [2050, 30, 2560] as [angles, detY, detX], flats [50, 30, 2560] and darks are [20, 30, 2560]. Data type is uint16.
This data is well suitable for testing stripe (ring) removal artefacts and is a part of this dataset. 

I13 Beamline data

Dataset file
Information
Data charachteristics
Notes

i13_dataset1.npz (179623.nxs)

360-degrees scan of some biological sample

Projection data dimensions [6001, 10, 2560] as [angles, detY, detX], flats [40, 10, 2560] and darks are [40, 10, 2560]. Data type is uint16.

This is a 360-degrees scan than needs to be converted into traditional 180-degrees data. The stitched data enlarges the FoV of the detector while reduced the angular dimension.

i13_dataset2.npz (179468.nxs)
180-degrees scan of some biological sample.

Projection data dimensions [2501, 10, 2560] as [angles, detY, detX], flats [40, 10, 2560] and darks are [40, 10, 2560]. Data type is uint16.

A well defined resolution for this biological sample.

i13_dataset3.npz (180622.nxs)
360-degrees scan

Projection data dimensions [6001, 3, 2560] as [angles, detY, detX], flats [40, 3, 2560] and darks are [40, 3, 2560]. Data type is uint16.

This is a 360-degrees scan than needs to be converted into traditional 180-degrees data. The stitched data enlarges the FoV of the detector, while reduced the angular dimension. 

K11 Beamline data

Dataset file
Information
Data charachteristics
Notes

k11_dataset1.npz (k11-37101)
180-degrees scan of some soil/rock sample.
Projection data dimensions [4001, 10, 2560] as [angles, detY, detX], flats [100, 10, 2560] and darks are [100, 10, 2560]. Data type is uint16.
The sample is within FOV.

Simulated data

Dataset file
Information
Data charachteristics
Notes

geant4_dataset1.npz
Geant4 simulated tomographic dataset in 180-degrees parallel-beam. 

Data dimensions [360, 540, 640] as [angles, detY, detX], flats and darks are [20, 50, 2560]. Data type is uint16.

The data is perfectly centered and within FOV. Various reconstruction methods can be tested, direct and iterative.

synth_tomophantom1.npz

TomoPhantom simulated data of 3d Shepp-Logan with noise and stripe artefacts in 180-degrees parallel beam

Data dimensions [400, 314, 600] as [detY, angles, detX], data type is float32.

The data is perfectly centered and normalised with negative log taken. Quite a significant number of stripe artefacts present.