Advanced Physics for Brachytherapy 2018
Example for cervix cancer Brachytherapy
D
x
(
+ a
b
) /
xGy
(
)
EQD
=
Gy
2
2(
+
a
b
) /
tumour ) (10 /
a
b
= =
OAR
a
/
b
(3
)
d
tumour Gy ( 7
= =
rectum Gy , ( 4.4 )
Brachy:
d
sigmoid
)
n
=
4
28
(
+
)10 7
Gy
) 7(
EQD
Gy
=
=
7.39
tumour
Gy
2
+
)10 2(
6.17
+
)34.4(
Gy
) 4.4(
EQD
Gy
=
=
26
OAR
Gy
2
+
)32(
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