A new computed tomography using imaging plate. (2). Possibility of image reconstruction from incomplete projection data.

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  • 輝尽性蛍光体イメージングプレートを用いたＸ線ＣＴの試作　（２）　不完全投影データからの画像再構成の可能性
  • -POSSIBILITY OF IMAGE RECONSTRUCTION FROM INCOMPLETE PROJECTION DATA-
  • ―不完全投影データからの画像再構成の可能性―

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Abstract

Possibility of a new Computed-Tomography (CT) using incomplete projection data was studied by computer simulations. Data acquired by Hollow and Limited angle projections were used carry out transverse images of mandibular in this system. The matrix size of images was 128×128. Projections and reconstructions were performed with NWS-1460 (SONY). The results were as follows:<br>1. Transverse images of phantoms could be reconstructed by Maximum-likelihood-reconstruction method in computer simulations with satisfaction.<br>2. Accuracy of images depended on the frequency of projections at each points of images. And our proposed projection data were appropriated for reconstruction of mandibular regions.<br>3. Computing-time required for calculation was about 50min. The increase in iterations at reconstructions could not improved obtained images significantly.<br>And, these results suggestted the possibility of a new 3-dimentional-Computed-Tomography.

Journal

  • Shika Hoshasen

    Shika Hoshasen 31 (4), 314-321, 1991

    Japanese Society for Oral and Maxillofacial Radiology

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