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>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "creator": [
    {
      "affiliation": "University of Helsinki", 
      "@type": "Person", 
      "name": "H\u00e4m\u00e4l\u00e4inen, Keijo"
    }, 
    {
      "affiliation": "Aalto University", 
      "@type": "Person", 
      "name": "Harhanen, Lauri"
    }, 
    {
      "affiliation": "University of Helsinki", 
      "@type": "Person", 
      "name": "Kallonen, Aki"
    }, 
    {
      "affiliation": "University of Helsinki", 
      "@type": "Person", 
      "name": "Kujanp\u00e4\u00e4, Antti"
    }, 
    {
      "affiliation": "University of Helsinki", 
      "@type": "Person", 
      "name": "Niemi, Esa"
    }, 
    {
      "affiliation": "University of Helsinki", 
      "@type": "Person", 
      "name": "Siltanen, Samuli"
    }
  ], 
  "url": "https://zenodo.org/record/1254206", 
  "datePublished": "2015-02-11", 
  "version": "1.0.0", 
  "keywords": [
    "X-ray", 
    "Radon transform", 
    "inverse problem"
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  "identifier": "https://doi.org/10.5281/zenodo.1254206", 
  "@id": "https://doi.org/10.5281/zenodo.1254206", 
  "@type": "Dataset", 
  "name": "Tomographic X-ray data of a walnut"
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