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Table 1 Attenuation measurements of iodine solutions at different iodine concentrations

From: Radiotherapy treatment planning with contrast-enhanced computed tomography: feasibility of dual-energy virtual unenhanced imaging for improved dose calculations

Iodine concentration [%w/w]

Attenuation value [HU]

Single-energy (120 kVp)

Dual-energy (80 kVp/Sn140 kVp)

Dual-energy (100 kVp/Sn140 kVp)

Mixed

Virtual unenhanced

Mixed

Virtual unenhanced

0.00

-11.3 ± 1.3

-10.4 ± 0.1

-23.0 ± 1.0

-10.7 ± 0.6

-21.0 ± 0.6

0.06

-3.9 ± 0.5

-6.9 ± 0.1

-26.8 ± 0.9

-8.0 ± 0.4

-24.5 ± 1.5

0.13

4.7 ± 0.5

0.1 ± 0.2

-25.1 ± 0.8

-1.6 ± 0.4

-24.1 ± 0.7

0.25

16.4 ± 0.4

11.1 ± 1.1

-26.6 ± 1.8

7.9 ± 0.8

-25.3 ± 1.1

0.50

40.5 ± 0.5

33.5 ± 0.2

-25.8 ± 1.1

27.2 ± 0.4

-25.7 ± 1.1

1.00

91.1 ± 0.4

78.5 ± 0.4

-27.1 ± 1.1

65.8 ± 0.6

-28.4 ± 0.4

2.00

192.3 ± 0.3

168.7 ± 0.3

-29.1 ± 0.3

143.0 ± 0.3

-32.5 ± 1.3

4.50

444.1 ± 0.7

397.9 ± 0.4

-28.7 ± 0.3

340.1 ± 0.3

-35.1 ± 1.9

  1. Note: Attenuation values are mean ± standard deviation from three measurements.