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Organ/ROI
Conventional (AP-PA)
IMRT
Left kidney
Mean dose (
SD)
34
±
8 Gy
22
±
3 Gy*
Left kidney
V20
Gy
(
SD)
77
±
19 %
54
±
11 %**
Right kidney
Mean dose (
SD)
10
±
5 Gy
11
±
2 Gy
Advanced radiation techniques reduce the dose to
both kidneys
Right kidney
V20
Gy
(
SD)
17
±
11 %
9
±
5 %
Liver
Mean dose (
SD)
15
±
3
18
±
2
Liver
V30
Gy
(
SD)
26
±
6
21
±
5
PTV V95%
(
SD)
95
±
3
98
±
2