154 / 1224
Linear attenuation coefficient
Having the densities the same material measured at two
tube voltages, one can solve for Z:
Or, solve for both Z and density simultanetously
M. Bazalova et al., PMB 53 (2008); Bazalova et al Radiother Oncol 86 (2008)
m
1
m
2
-
w
1
i
Z
4
F E
1
i
,
Z
(
)
+
G E
1
i
,
Z
(
)
éë
ùû
i
å
w
2
i
Z
4
F E
2
i
,
Z
(
)
+
G E
2
i
,
Z
(
)
éë
ùû
i
å
=
0