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1. No optimization (Paris Dosimetry System)
• uniform dwell times
2. Forward optimization
• manual optimization (editing dwell times/weights)
• geometrical optimization (on distance and volume)
• polynomial optimization on
- distance dose points (dwell time gradient restrictions)
- volume dose points (SSDS – extension of PDS)
- dose points on the target surface (conformal)
• graphical optimization (only for local adjusments)
3. Inverse optimization (IPSA, HIPO)
• anatomy based with surface and volume dose objectives
Optimization methods in HDR/PDR BT