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Example EBRT +
PDR
-BT for cervical carcinoma
a/b = 10 Gy for cervical tumour
a/b = 3 Gy for OAR (bladder, rectum, sigmoid)
T1/2 = 1.5 h for cervical tumour and OAR
BT treatment time: 80h (PDR: pulse time = 15 min, interval = 1 h)
D90 HR-CTV
physical dose
EQD2
External beam 25 x 1.8 Gy =
45 Gy
44 Gy
ab10
BT 0.5Gy/h
80 x 0.5 Gy = 40 Gy
40 Gy
ab10
Total dose
85Gy
84 Gy
ab10
OAR brachy dose to OAR D2cc
External beam 25 x 1.8 Gy =
45 Gy
43 Gy
ab3
BT 0.35Gy/h 80 x 0.35 Gy = 28 Gy
31 Gy
ab3
Total dose
73 Gy
68 Gy
ab3
84 Gy
10
74 Gy
3
HDR
HDR
=
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