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? ?4. CT ???????,??????MTF(modulation transfer function)????[97-2??] (A)??(linearity) (B)?????(spatial resolution) (C)??(noise) (D)????. ? ?5. ????????(energy resolution)????????[97-2??] (A)???(standard deviation) (B)???(mean) (C)????(FWHM) (D)????(Gaussia
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