Comparisons of routine liver image between FBP, ASiR and ASiR-V. The top line were routine liver images of FBP, ASiR-V60% and ASiR-V100% on the Revolution CT scanner with subjective quality score of 4, 5 and 3, from left to right respectively; The bottom line were the routine liver images of FBP, ASiR50% and ASiR100% on the HDCT750 scanner with subjective quality score of 3, 4 and 3, from left to right respectively. ASiR, adaptive statistical iterative reconstruction; FBP, filtered back projection.