This page contains following datasets:

- Tomographic X-ray data of a lotus root slice filled with different chemical elements
- Tomographic X-ray data of a walnut
- Tomographic X-ray data of a carved cheese
- Tomographic X-ray data of 3D emoji

A video report of the data measurement session is available here:

This is an open-access dataset of tomographic X-ray data of a slice of a lotus root. The data can be freely used for scientific purposes with appropriate references to the data and to the documentation in arXiv.

Here are the results from the above Matlab routines Lotus_Landweber.m (120 projection angles) and Lotus_Tikhonov.m (20 projection angles), respectively:

The reason to have exactly double resolution (128x128 and 256x256) is to allow regularization parameter choice methods based on comparing the reconstructions at two different resolutions. See this arXiv file for more information.

This is an open-access dataset of tomographic X-ray data of a walnut. The data can be freely used for scientific purposes with appropriate references to the data and to the documentation of the data in arXiv.

The dataset consists of the X-ray sinogram of a single 2D slice of the walnut with three different resolutions and the corresponding measurement matrices modeling the linear operation of the X-ray transform. Each of these sinograms was obtained from a measured 120-projection fan-beam sinogram by down-sampling and taking logarithms. The original (measured) sinogram is also provided in its original form and resolution. In addition, a larger set of 1200 projections of the same walnut was measured and a high-resolution filtered back-projection reconstruction was computed from this data; both the sinogram and the FBP reconstruction are included in the dataset, the latter serving as a ground truth reconstruction.

- Documentation_v1.pdf
- Data82.mat
- Data164.mat
- Data328.mat
- FullSizeSinograms.mat
- GroundTruthReconstruction.mat
- example.m

A video report of the data measurement session is available here:

This is an open-access dataset of tomographic X-ray data of a carved cheese. The data can be freely used for scientific purposes with appropriate references to the data and to the documentation in arXiv.

The dataset consists of (1) the X-ray sinogram of a single 2D slice of the cheese slice with three different resolutions and (2) the corresponding measurement matrices modeling the linear operation of the X-ray transform. Each of these sinograms was obtained from a measured 360-projection fan-beam sinogram by down-sampling and taking logarithms. The original (measured) sinogram is also provided in its original form and resolution.

- DataFull_128x15.mat
- DataFull_128x45.mat
- DataFull_128x180.mat
- DataFull_256x15.mat
- DataFull_256x45.mat
- DataFull_256x180.mat
- DataFull_512x15.mat
- DataFull_512x45.mat
- DataFull_512x180.mat
- DataLimited_128x15.mat
- DataLimited_128x45.mat
- DataLimited_256x15.mat
- DataLimited_256x45.mat
- DataLimited_512x15.mat
- DataLimited_512x45.mat
- FullSizeSinograms.mat
- GroundTruthReconstruction.mat

This is an open access dataset of tomographic X-ray data of emoji phantom. The dataset consists of

- the X-ray sinogram of a single 2D slice of 33 emoji faces (contains 15 different emoji faces) made by small squared ceramic stones, and
- the corresponding static and dynamic measurement matrices modeling the linear operation of the X-ray transform.

Each of these sinograms was obtained from a measured 60-projection fan-beam sinogram by down-sampling and taking logarithms. The original (measured) sinogram is also provided in its original form and resolution.

The data is licenced under an open data licence (CC BY 4.0) and it is hosted on Zenodo.