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A central Gaussian 9 pixels in width, multiplied by a plane wave of a discrete spatial frequency, is subject to undersampling. The artifact pattern is shown for 96 and 64 projections, and carrier frequencies of kr =1/7 and 2/7. The artifact generated by the localized plane waves appears at a distance predicted by Eq. [2]. The signal intensity and frequency of the artifacts are about the same as the signal and frequency of the generating object. See Table 1.
