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TPS - general limitations
Lack of beam data to drive dose calculations outside the largest field
Main TPS concern is planning dose to target (and saving nearby risk organ)
– Dose in the beam channel and penumbras modeled correctly…
– …scatter usually OK but…
– …less focus on accurate leakage outside of penumbra, far away scatter & neutrons
Peripheral dose considered as a radiation protection issue
– TPS designed for individual patient contexts (radiation protection to population)