February 11, 2015 Dataset Open Access

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

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    "description": "<p>This is an open-access dataset of tomographic X-ray data of a walnut. 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.</p>\n\n<p>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.</p>\n\n<p>Documentation of the dataset is available at <a href=\"https://arxiv.org/abs/1502.04064\">arxiv.org/abs/1502.04064</a>. See also <a href=\"https://www.fips.fi/dataset.php\">www.fips.fi/dataset.php</a>.</p>", 
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        "affiliation": "Aalto University", 
        "name": "Harhanen, Lauri"
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