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Comparison of the amount of noise of images between FBP and AIDR for voltage variations. 1 shows the voltage of 135 kVp, 2 shows the voltage of 120 kVp, 3 shows the voltage of 100 kVp and 4 shows the voltage of 80 kVp. (a) On polypropylene objects, (b) on nylon objects, (c) on acrylic (PMMA) objects, and (d) on Delrin objects.
