Fig. 3.

Difference in total number of detected calcifications of the static (D100) insert in the large thorax phantom for all combinations of tube currents (in percentage of reference) and reconstruction methods compared with the reference (120 kVp, 100% dose, FBP). For each repetition, a calcification was defined as ‘missed’ when the calcification was detected with the reference protocol but was not detected with varying acquisition and/or reconstructions parameters. The opposite was defined as an ‘extra calcification’. All repetitions with BAS > 0 were defined as nondiagnostic (ND) image quality and were therefore omitted from the analysis. BAS background Agatston score, FBP filtered back projection, HIR hybrid iterative reconstruction, MBIR model-based iterative reconstruction, DLR deep learning-based reconstruction, # number