2654-2655 / 3581
What PTV margin?
03/01/13
Murthy V et al., Radiother Oncol 2014
% geographical miss of the
bladder wall
Sup
Inf
Ant
Post
L Lat R Lat
Treated w/ full bladder
16.1
0
12.1
0.5
4.5
8.0
Treated w/ empty bladder
11.5
0
7.3
3.1
4.2
4.2
All patients
13.8
0
10.3
1.3
4.4
6.9
Frequencies of PTVs
selected as ‘plan of the day’
5 mm 10 mm 15 mm 20 mm 25-
30mm
Total
Treated w/ full bladder
42.0% 46.6% 11.0% 0.5%
0.0%
100%
Treated w/ empty bladder
20.8% 69.8% 8.3%
1.0%
0.0%
100%
All patients
35.6% 53.7% 10.2% 0.6%
0.0%
100%