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Average percentage error (normalized by CTDIvol) of the three estimation strategies across four modulation strengths for chest scans. Convolution-based method refers to the method using (CTDIvol)organ, convolution to model the local dose field. Weighted current-based method refers to the method using (CTDIvol)organ, weighted to model the dose field. Average current-based method refers to the method using the CTDIvol of entire exam to model the local dose field.
