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CT numbers measured in region of interest (ROI) 4, which contained iodinated contrast media, show an increase in CT numbers in the lower energy Bin 1 (B1) of the photon counting detector (PCD) system and a decrease in the higher energy Bin 2 (B2) of the PCD system relative to the energy integrating (EID) system. Shown here are the CT-values for the 20 cm phantom at 300 mAs.
