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Understanding MRI concepts: precondition for CT based contouring
1 cm around
HR CTV
Confined by
anatomical
borders
Macroscopic cancer cell density
Potential
microscopic
Significant
microscopic
Potential
microscopic
Significant
microscopic
Cancer cell density
Pelvic regions
Pelvic wall
Pelvic wall
Cervix
GTV
(visible/palpable tumor)
HR CTV
IR CTV
IR CTV
LR CTV
LR CTV
Different dose levels required to sterilize the three CTVs
CT for IGABT?