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• W2047988682 abstract "We present and evaluate a special ultrahigh resolution mode providing considerably enhanced spatial resolution both in the scan plane and in the -axis direction for a routine medical multi-detector row computed tomography (CT) system. Data acquisition is performed by using a flying focal spot both in the scan plane and in the -axis direction in combination with tantalum grids that are inserted in front of the multi-row detector to reduce the aperture of the detector elements both in-plane and in the -axis direction. The dose utilization of the system for standard applications is not affected, since the grids are moved into place only when needed and are removed for standard scanning. By means of this technique, image slices with a nominal section width of (measured full width at half maximum=) can be reconstructed in spiral mode on a CT system with a detector configuration of . The measured 2% value of the in-plane modulation transfer function (MTF) is , the measured 2% value of the longitudinal ( axis) MTF is . In a resolution phantom with metal line pair test patterns, spatial resolution of can be demonstrated both in the scan plane and along the axis. This corresponds to an object size of that can be resolved. The new mode is intended for ultrahigh resolution bone imaging, in particular for wrists, joints, and inner ear studies, where a higher level of image noise due to the reduced aperture is an acceptable trade-off for the clinical benefit brought about by the improved spatial resolution." @default.
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• W2047988682 date "2007-04-24" @default.
• W2047988682 modified "2023-09-25" @default.
• W2047988682 title "Novel ultrahigh resolution data acquisition and image reconstruction for multi-detector row CT" @default.
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• W2047988682 doi "https://doi.org/10.1118/1.2722872" @default.
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