A team of researchers at the Karlsruhe Institute of Technology in Germany say that they have developed a technique to record 3D X-ray films showing internal movement dynamics in a spatially precise manner and, at the same time, in the temporal dimension. They applied this technique to image the moving hip joint of a live weevil. At a speed of up to 100,000 2D radiographs per second, the scientists generated complete 3D film sequences in real time or slow motion. Three-dimensional radiographs can show internal structures, but don’t show movement sequences. Conventional CT imaging can’t reproduce movement in a spatially precise manner and, at the same time, in the temporal dimension. Every individual 3D image, called a tomogram, is reconstructed from hundreds of 2D radiographs. In order to produce highly resolved tomograms at a high recording speed, they had to adjust every setting screw, from the X-ray source to the pixel detector and then optimally attuned each process step to the other, they explained. They call their technique “cinematomography”.
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