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  • Computed tomography (CT) scanning systems in which the table moves the patient at a constant velocity into the gantry and the x-ray tube rotates around the patient in such a way that the beam traces a spiral path, continuously gleaning imaging data from the region of interest. These systems obtain multiple images in each revolution and allow the operator to alter some processing parameters after the scan, including, among other capabilities, \'reslicing\' data according to a different set of parameters without having to rescan the patient. Typical scanning time for each helix is on the order of one second, but faster scans are possible.
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