Lung tissue substitute

Lung (ICRU 44)

Natural cork

RMI455

Water treated cork

Physical density (g/cm³)

0.26

0.20

0.30

0.25

ρ_e (electrons/g)

3.32 × 10²³

3.23 × 10²³

3.26 × 10²³

3.28 × 10²³

n_e (electrons/cm³)

8.62 × 10²²

6.47 × 10²²

9.77 × 10²²

8.21 × 10²²

Effective atomic number

7.66

6.99

7.68

7.16

CT number

−950 to −750

−783 ± 13

−710

−742 ± 23

Element

wt.%

H

10.3

7.7

15.8

16.4 ± 2.1*

C

10.5

56.6

54.9

26.3 ± 3.1*

N

3.1

0.4

1.8

0.1 ± 0.0*

O

74.9

34.5

16.8

56.8 ± 5.3*

Na

0.2

Mg

10.2

Al

Si

0.7

0.7

P

0.2

S

0.3

Cl

0.3

K

0.2

0.1

Ash.

0.4