Open X-ray Tomographic Datasets

This page contains the following data sets:

Tomographic X-ray data of a lotus root slice filled with different chemical elements

Tatiana A. Bubba, Andreas Hauptmann, Simo Huotari, Juho Rimpeläinen and Samuli Siltanen

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

This is an open-access data set 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.

Documentation in arXiv:

http://arxiv.org/abs/1609.07299

Files:

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

Reconstructed image of a lotus, 120 projection angles Reconstructed image of a lotus, 20 projection angles

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.


Tomographic X-ray data of a walnut

Keijo Hämäläinen, Lauri Harhanen, Aki Kallonen, Antti Kujanpää, Esa Niemi and Samuli Siltanen

“Ground truth” reconstruction of a walnut 
            computed from 1200 projections using FBP Tikhonov reconstruction of a walnut from 120 projections Tikhonov reconstruction of a walnut from 20 projections
Left: "Ground truth" reconstruction computed from 1200 projections using FBP,
Middle: Tikhonov reconstruction from 120 projections,
Right: Tikhonov reconstruction from 20 projections.

This is an open-access data set 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 data set 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 data set, the latter serving as a ground truth reconstruction.

Documentation in arXiv:

http://arxiv.org/abs/1502.04064

Complete set:

Separate files:


Tomographic X-ray data of a carved cheese

Tatiana A. Bubba, Markus Juvonen, Jonatan Lehtonen, Maximilian März, Alexander Meaney, Zenith Purisha and Samuli Siltanen

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

This is an open-access data set 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 data set 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.

Documentation in arXiv:

https://arxiv.org/abs/1705.05732

Files: