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Table 3 Absolute CNR values without and with large head MoM THA prosthesis scans with and without O-MAR for pellets L0, L5, L6 and L8

From: Quantitative analysis of orthopedic metal artefact reduction in 64-slice computed tomography scans in large head metal-on-metal total hip replacement, a phantom study

Pellet kVp mAs Filter iDose4 level No MoM THA baseline MoM THA O-MAR off MoM THA O-MAR on
CNR CNR CNR
L0 120 150 A 5 33.06 13.02 12.99
L5 120 150 A 5 22.74 13.01 19.24
L6 120 150 A 5 16.75 1.37 18.16
L8 120 150 A 5 23.12 5.18 4.19
L0 120 600 A 5 46.52 23.07 23.07
L5 120 600 A 5 41.18 26.31 37.11
L6 120 600 A 5 41.65 5.84 24.72
L8 120 600 A 5 29.71 7.32 5.74
L0 140 101 A 5 20.27 17.51 17.51
L5 140 101 A 5 18.60 8.98 14.02
L6 140 101 A 5 19.77 0.77 23.69
L8 140 101 A 5 22.94 6.61 4.64
L0 140 405 A 5 43.88 30.64 30.65
L5 140 405 A 5 27.55 19.98 30.69
L6 140 405 A 5 53.21 0.85 28.91
L8 140 405 A 5 40.34 8.51 6.13
  1. Significant positive effect of OMAR (p < 0.001) for pellet L5 and L6 regarding absolute change in CNR values caused by metal artefacts