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Boxplots demonstrating the effective radiation dose per annual quarter. CT scans from quarter 1 were performed at 120 kVp with the FBP algorithm. In quarters 2 and 3, images were acquired with the iDose4 technique (iterative strength of 4 and a tube voltage of 120 kVp). In quarter 4, images were acquired at 100 kVp and iterative strength was increased to 5
