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Table 1 Comparison of the CT values with and without the x-ray attenuation rubber layer

From: Influence of beam hardening in dual-energy CT imaging: phantom study for iodine mapping, virtual monoenergetic imaging, and virtual non-contrast imaging

  Iodine map VME (70 keV) VNC 80 kVp 135 kVp
Without rubber With rubber Without rubber With rubber Without rubber With rubber Without rubber With rubber Without rubber With rubber
Iodine (2.00 mg/mL) 83.7 ± 1.6 84.4 ± 1.0 31.4 ± 0.4 42.3 ± 0.4 -52.3 ± 1.6 -42.1 ± 0.8 101.5 ± 0.3 99.9 ± 0.4 38.8 ± 0.2 46.3 ± 0.3
Iodine (5.00 mg/mL) 185.7 ± 1.8 183.5 ± 0.7 110.2 ± 0.4 125.2 ± 0.3 -75.5 ± 1.7 -58.3 ± 0.7 233.7 ± 0.4 221.4 ± 0.5 113.8 ± 0.1 118.6 ± 0.2
Iodine (10.00 mg/mL) 369.1 ± 2.1 354.6 ± 0.9 218.0 ± 0.5 248.5 ± 0.4 -151.1 ± 2.0 -106.1 ± 0.9 460.1 ± 0.4 431.1 ± 0.4 214.2 ± 0.5 222.3 ± 0.5
Iodine (2.00 mg/mL) + Blood 77.1 ± 1.1 80.8 ± 0.6 82.8 ± 0.4 87.5 ± 0.2 5.8 ± 1.2 6.8 ± 0.7 145.3 ± 0.2 143.1 ± 0.3 89.9 ± 0.3 91.1 ± 0.3
Iodine (4.00 mg/mL) + Blood 159.6 ± 2.5 151.7 ± 1.1 108.3 ± 0.5 135.2 ± 0.3 -51.3 ± 2.2 -16.5 ± 0.9 241.1 ± 0.4 229.4 ± 0.5 114.6 ± 0.4 132.0 ± 0.2
Blood (1.07 ρeW) 9.7 ± 1.5 6.7 ± 0.7 31.3 ± 0.7 52.7 ± 0.4 21.6 ± 1.0 46.0 ± 0.7 87.3 ± 0.3 90.6 ± 0.3 41.6 ± 0.3 63.3 ± 0.4
Blood (1.10 ρeW) 0.6 ± 0.2 0.5 ± 0.2 92.2 ± 0.6 99.0 ± 0.3 91.6 ± 0.6 98.6 ± 0.4 115.8 ± 0.6 119.3 ± 0.3 102.7 ± 0.3 110.3 ± 0.3
Brain (1.02 ρeW) 15.0 ± 1.2 18.4 ± 1.1 22.1 ± 0.3 25.2 ± 0.2 7.1 ± 1.3 6.8 ± 1.0 43.5 ± 0.5 47.5 ± 0.4 30.4 ± 0.2 34.8 ± 0.3
Water (1.00 ρeW) 12.5 ± 0.8 15.1 ± 0.7 -16.0 ± 0.2 -13.2 ± 0.3 -28.5 ± 0.8 -28.3 ± 0.8 -1.8 ± 0.4 0.7 ± 0.4 -8.1 ± 0.2 -4.3 ± 0.2
  1. Unless otherwise indicated, data are the mean ± standard deviation. VME Virtual monoenergetic, VNC Virtual non-contrast. Statistical differences (p < 0.05) are underlined for comparison