566 / 1778
HR-CTV
Rectum
CT
MR
Bladder
OAR
MRI: organ wall is visible
CT: organ border is visible
Target
MRI: HR-CTV, GTV
CT: +/-HR-CTV
(soft tissue depiction ↓)
Applicator
MRI
CT
Anatomical
Structures
MRI
CT ↓
From: Viswanathan et al. IJROBP 2007
Choice of imaging modality for IGABT
Target, Organs, Applicator