From: PTV margin definition in hypofractionated IGRT of localized prostate cancer using cone beam CT and orthogonal image pairs with fiducial markers
Σ (mm)
σ (mm)
Bones
vrt
1.92
1.87
lng
1.72
1.69
lat
0.61
0.90
Balloon
1.68
1.82
1.20
1.66
Soft tissue
0.77
1.09
0.36
0.17
0.49
0.93