583 / 1152
20
CTV
OAR
95%
conventional
planning
PTV
P(98% of CTV gets dose > 95%) = 98%
CTV
OAR
probabilistic
planning
P(98% of CTV gets dose > 95%) = 98%
Probabilistic / robust planning to replace PTV/PRV
concepts
Probabilistic / robust planning to replace PTV/PRV
concepts
• Directly optimize CTV/OAR dose
• HOW:
- cost functions include knowledge on motion
OR
- simultaneously optimize multiple scenario’s
• If prostate moves anteriorly, then also the proximal
part of the rectum
• Automatically generate high dose area around CTV
• Challenges: (individualized) motion pattern,
anatomy deformation, calculation speed
• Highly relevant for IMPT (Bragg peak)