The Optimal Combination of Monochromatic and Metal Artifact Reconstruction Dual-energy CT to Evaluate Total Knee Replacement Arthroplasty

•GSI-MAR with higher-energy monochromatic imaging decreases metal artifacts and improves image quality on TKRA evaluation.•MAR-related new artifacts are noted in 14.7 % of images and only in the femoral component.•GSI-MAR with 140 keV imaging shows the best image quality among the image combinations when evaluating TKRA.•Imaging at 140 keV without GSI-MAR is need for identifying MAR-related new artifacts.