cc-by-4.0Siltanen, Samuli2025-04-292017-05-122017-05-12https://datakatalogi.helsinki.fi/handle/123456789/4138This is an open-access dataset of tomographic X-ray data of a carved cheese. The dataset consists of the X-ray sinogram of a single 2D slice of the cheese slice with three different resolutions, and the corresponding measurement matrices modeling the linear operation of the X-ray transform. Each of the 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 of the dataset is available at arxiv.org/abs/1705.05732. See also www.fips.fi/dataset.php.X-rayRadon transforminverse problemdataset