Open X-ray Tomographic Datasets


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:
LotusData128.mat
LotusData256.mat
sinogram.mat
Lotus_FBP.m
Lotus_Landweber.m
Lotus_Tikhonov.m

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.


Tomographic X-ray data of a walnut

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

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:
CT_walnut_v1.zip

Separate files:
Documentation_v1.pdf
Data82.mat
Data164.mat
Data328.mat
FullSizeSinograms.mat
GroundTruthReconstruction.mat
example.m