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Table 1 X-ray energy emission and absorption features for tungsten, iodine and water

From: DNA breaks induced by iodine-containing contrast medium in radiodiagnostics: a problem of tungsten?

Energy (keV) Relative emission intensity of a typical 120-kV CT x-ray tube Iodine mass energy absorption coefficient
μen
Water mass energy absorption coefficient
μen
μen/ρ (iodine) / μen/ρ (water) Relative absorption
(iodine in water)
Relative emission × absorption
20 0 23.63 0.55 42.96 0.28 0
33 (I K edge) 0.10 11.90 0.1557 76.429 0.49 0.049
40 0.18 9.62 0.06947 138.47 0.89 0.1602
50 0.21 6.57 0.04223 155.576 1 0.21
59.3 (W Kα edge) 1 4.58 0.0328 139.634 0.91 0.91
60 0.21 4.52 0.0319 141.692 0.90 0.1911
67.23 (W Kβ edge) 0.50 3.77 0.0285 132.28 0.85 0.425
80 0.17 2.33 0.02597 89.71 0.57 0.0969
120 0 0.91 0.0265 34.33 0.22 0
  1. μen/ρ are expressed in cm2.g−1