| 摘要 |
PURPOSE:To enable zoomed, reconfigured images of several portions at each photographic position to be taken at a time in addition to or without a total tomogram by simply designating in advance a position at which it is desired to take a tomogram, its photographic condition, and plural areas desired to be zoomed. CONSTITUTION:A photographic position planned in advance and its photographic condition are stored in memory and set in a projection data collecting system. Projection data collected in sequence as tomograms are taken is preprocessed and then the projection data of each direction is partially enlarged and reprojected to the center position and at the magnitude of each area desired to be zoomed. In this case, a data memory area or a disc area in which the half-reprojected image of each area can be stored is prepared and thereby reprojection of each area is performed through parallel processes: Or, preprocessed data may be stored and called at plural times of zooming so as to perform partial enlargement and reconfiguring of every polural portions.
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