718 / 1224
Effective dose in EQD
2Gy
(normalized to
2Gy fx)
EQD
2
Gy
=
D
(
xGy
)
(
x
+
a
/
b
)
(2
+
a
/
b
)
a
/
b
=
10(
tumour
)
a
/
b
=
3(
OAR
)
d
=
1.8
Gy
n
=
25
EQD
2
Gy
=
45
(1.8
Gy
)
(1.8
+
10)
(2
+
10)
=
44.3
Gy
EQD
2
Gy
=
45
(1.8
Gy
)
(1.8
+
3)
(2
+
3)
=
43.2
Gy
tumour
OAR
EBRT: