Fig. 1
A1–A5 Reconstruction of soft tissue window at VMI50 keV, VMI70 keV, VMI90 keV, VMI110 keV, and VMI130 keV in MMAR group. C1–C5 Reconstruction of bone window at VMI50 keV, VMI70 keV, VMI90 keV, VMI110 keV, and VMI130 keV in MMAR group. Radial high-density radial artifacts are visible around the metal implants. The artifacts significantly reduce, and the adjacent structures become clear with the increase in the kiloelectronvolt. This suggests the artifact reducing effect is favorable and the implant is clearly distinguishable. B1–B5 Reconstruction of soft tissue window at VMI50 keV, VMI70 keV, VMI90 keV, VMI110 keV, and VMI130 keV in MARS group. D1–D5 Reconstruction of bone window at VMI50 keV, VMI70 keV, VMI90 keV, VMI110 keV, and VMI130 keV in MARS group. The artifact reducing effect is poor after use of MARS for artifact reduction, and the image quality is not significantly improved; the artifact reducing effect is the best in B5, but the contrast of soft tissues at the bottom of the mouth reduces