Systematic modality difference (axial MRI - CT)
0
90
180
270
360
-90
-45
0
45
φ
(degrees)
θ
(degrees)
apex
bladder
seminal
vesicles
p o s t e r i o r
a n t e r i o r
L
R
L
2
1
0
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
-10
-11
(mm)