Table 5.

Scores for blotchy, pixilated imaging appearance of 27 abdominal CT studies

Reconstruction technique	Filtered back projection	30% ASIR-V	50% ASIR-V	70% ASIR-V
Pixilation score (1/2/3/4)	27/0/0/0	27/0/0/0	26/1/0/0	9/16/2/0

ASIR-V, adaptive statistical iterative reconstruction V.

Data are numbers of CT studies given pixilation scores of 1 (none), 2 (minor), 3 (substantial), and 4 (severe) respectively. Because discrete values cannot be averaged, the lower or similar scores for pixilation given by the radiologists are presented.