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Images of an abdominal phantom (CIRS, Norfolk, VA). From left to right, original CBCT slice, slice corrupted with impulse noise (salt and pepper), and slice corrupted with a low pass filter. Both corrupted slices have the same peak signal to noise ratio (34.4 dB) and are displayed using the same window and level values (1780,0). It is clear that the perceptual quality of the image corrupted by impulse noise is higher than the image corrupted via the low pass filter.
